AtCoder Beginner Contest 062 - 3N Numbers

Let N be a positive integer.
There is a numerical sequence of length 3N, a = (a_1, a_2, ..., a_{3N}).
Snuke is constructing a new sequence of length 2N, a', by removing exactly N elements from a without changing the order of the remaining elements.
Here, the score of a' is defined as follows: (the sum of the elements in the first half of a') - (the sum of the elements in the second half of a').
Find the maximum possible score of a'.

-----Constraints-----
 - 1 ≤ N ≤ 10^5
 - a_i is an integer.
 - 1 ≤ a_i ≤ 10^9

-----Partial Score-----
 - In the test set worth 300 points, N ≤ 1000.

-----Input-----
Input is given from Standard Input in the following format:
N
a_1 a_2 ... a_{3N}

-----Output-----
Print the maximum possible score of a'.

-----Sample Input-----
2
3 1 4 1 5 9

-----Sample Output-----
1

When a_2 and a_6 are removed, a' will be (3, 4, 1, 5), which has a score of (3 + 4) - (1 + 5) = 1.

Difficulty: MEDIUM

Starter code:

Solutions:
from heapq import heapify, heappushpop

def abc062_d():
	n = int(input())
	A = list(map(int, input().split()))
	front = A[:n]
	fsum = [0] * (3 * n)
	fsum[n - 1] = sum(front)
	heapify(front)
	for i in range(n, 2 * n):
		fmin = heappushpop(front, A[i])
		fsum[i] = fsum[i - 1] + A[i] - fmin
	back = [-1 * a for a in A[2 * n:]]
	bsum = [0] * (3 * n)
	bsum[2 * n] = -1 * sum(back)
	heapify(back)
	for i in range(2 * n - 1, n - 1, -1):
		bmax = -1 * heappushpop(back, -1 * A[i])
		bsum[i] = bsum[i + 1] + A[i] - bmax
	ans = -10 ** 18
	for i in range(n - 1, 2 * n):
		ans = max(ans, fsum[i] - bsum[i + 1])
	print(ans)

def __starting_point():
	abc062_d()
__starting_point()


n = int(input())
a = list(map(int, input().split()))
ans = -10 ** 18
a_minus = [-x for x in a]
af = a[:n]
ae = a_minus[2 * n:]
f_sum = [sum(af)]
e_sum = [sum(ae)]
from heapq import heapify, heappop, heappush
heapify(af)
for aa in a[n:2 * n]:
	heappush(af, aa)
	t = heappop(af)
	f_sum.append(f_sum[-1] + aa - t)
heapify(ae)
for aa in reversed(a[n:2 * n]):
	heappush(ae, -aa)
	t = heappop(ae)
	e_sum.append(e_sum[-1] - aa - t)
for (f, e) in zip(f_sum, reversed(e_sum)):
	ans = max(ans, f + e)
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
al = A[:N]
heapq.heapify(al)
sal = sum(al)
suml = [sal]
for i in range(N, 2 * N):
	if al[0] < A[i]:
		tmp = heapq.heappop(al)
		heapq.heappush(al, A[i])
		sal += A[i] - tmp
	suml.append(sal)
ar = [-a for a in A[2 * N:]]
heapq.heapify(ar)
sar = -sum(ar)
sumr = [sar]
ans = -10 ** 15
for i in range(N, 2 * N):
	if -ar[0] > A[3 * N - 1 - i]:
		tmp = -heapq.heappop(ar)
		heapq.heappush(ar, -A[3 * N - 1 - i])
		sar += A[3 * N - 1 - i] - tmp
	sumr.append(sar)
for i in range(len(suml)):
	ans = max(ans, suml[i] - sumr[-(i + 1)])
print(ans)


import sys
from heapq import heapify, heappush, heappushpop

def main():
	input = sys.stdin.readline
	N = int(input())
	A = list(map(int, input().split()))
	F = [0 for _ in range(N + 1)]
	B = [0 for _ in range(N + 1)]
	F[0] = sum(A[:N])
	B[N] = sum(A[2 * N:])
	Ffactors = []
	Bfactors = []
	for i in range(N):
		heappush(Ffactors, A[i])
		heappush(Bfactors, -A[3 * N - 1 - i])
	for i in range(1, N + 1):
		F[i] = F[i - 1] + A[N - 1 + i] - heappushpop(Ffactors, A[N - 1 + i])
		B[N - i] = B[N + 1 - i] + A[2 * N - i] + heappushpop(Bfactors, -A[2 * N - i])
	ans = -float('inf')
	for i in range(N + 1):
		ans = max(ans, F[i] - B[i])
	return ans
print(main())


import sys
input = sys.stdin.readline
from heapq import *
N = int(input())
a = list(map(int, input().split()))
pq = []
s = 0
minus = [-1] * (N + 1)
for i in range(3 * N - 1, 2 * N - 1, -1):
	heappush(pq, -a[i])
	s += a[i]
minus[N] = s
for i in range(2 * N - 1, N - 1, -1):
	if a[i] < -pq[0]:
		s -= -heappop(pq)
		heappush(pq, -a[i])
		s += a[i]
	minus[i - N] = s
pq = []
s = 0
for i in range(N):
	heappush(pq, a[i])
	s += a[i]
ans = s - minus[0]
for i in range(N, 2 * N):
	if a[i] > pq[0]:
		s -= heappop(pq)
		heappush(pq, a[i])
		s += a[i]
	ans = max(ans, s - minus[i - N + 1])
print(ans)


from heapq import heapify, heappushpop
import sys
sys.stdin.readline

def main():
	N = int(input())
	A = list(map(int, input().split()))
	B = [0] * (N + 1)
	C = [0] * (N + 1)
	H = [a for a in A[:N]]
	heapify(H)
	B[0] = sum(A[:N])
	for i in range(N):
		x = heappushpop(H, A[N + i])
		B[i + 1] = B[i] + A[N + i] - x
	H = [-a for a in A[2 * N:]]
	heapify(H)
	C[0] = sum(A[2 * N:])
	for i in range(N):
		x = -heappushpop(H, -A[2 * N - i - 1])
		C[i + 1] = C[i] + A[2 * N - i - 1] - x
	print(max((b - c for (b, c) in zip(B, C[::-1]))))

def __starting_point():
	main()
__starting_point()


from heapq import heappop, heappush
n = int(input())
a = list(map(int, input().split()))
l = [0] * (n + 1)
r = [0] * (n + 1)
s = sum(a[:n])
t = sum(a[-n:])
l[0] = s
r[~0] = t
h = []
H = []
for i in range(n):
	heappush(h, a[i])
	heappush(H, -a[~i])
for i in range(n):
	s += a[n + i]
	t += a[~(n + i)]
	heappush(h, a[n + i])
	heappush(H, -a[~(n + i)])
	s -= heappop(h)
	t += heappop(H)
	l[i + 1] = s
	r[~(i + 1)] = t
print(max((l[i] - r[i] for i in range(n + 1))))


import sys
import queue

def main():
	n = int(input())
	nnn = list(map(int, input().split()))
	ppp = nnn[:n]
	ccc = nnn[n:2 * n]
	bbb = nnn[2 * n:]
	pp_v = [0] * (n + 1)
	ppq = queue.PriorityQueue()
	for v in ppp:
		ppq.put(v)
	pre = sum(ppp)
	pp_v[0] = pre
	for (i, v) in enumerate(ccc):
		ppq.put(v)
		t = ppq.get()
		pre = pre + v - t
		pp_v[i + 1] = pre
	bb_v = [0] * (n + 1)
	bbq = queue.PriorityQueue()
	for v in bbb:
		bbq.put(-v)
	pre = -1 * sum(bbb)
	bb_v[0] = pre
	for (i, v) in enumerate(ccc[::-1]):
		bbq.put(-v)
		t = bbq.get()
		pre = pre + -v - t
		bb_v[i + 1] = pre
	dd = [p + q for (p, q) in zip(pp_v, bb_v[::-1])]
	ans = max(dd)
	print(ans)
isTest = False

def pa(v):
	if isTest:
		print(v)

def __starting_point():
	if sys.platform == 'ios':
		sys.stdin = open('inputFile.txt')
		isTest = True
	else:
		pass
	ret = main()
	if ret is not None:
		print(ret)
__starting_point()


import heapq

def main():
	n = int(input())
	a = list(map(int, input().split()))
	q = []
	heapq.heapify(q)
	frnt = [None] * 3 * n
	back = [None] * 3 * n
	heapq.heappush(q, a[0])
	frnt[0] = a[0]
	for i in range(1, 2 * n + 1):
		frnt[i] = a[i]
		frnt[i] += frnt[i - 1]
		heapq.heappush(q, a[i])
		if n <= i:
			frnt[i] -= heapq.heappop(q)
	q = []
	heapq.heapify(q)
	heapq.heappush(q, -1 * a[3 * n - 1])
	back[3 * n - 1] = a[3 * n - 1]
	for i in reversed(range(n - 1, 3 * n - 1)):
		back[i] = a[i]
		back[i] += back[i + 1]
		heapq.heappush(q, -1 * a[i])
		if i < 2 * n:
			back[i] += heapq.heappop(q)
	ans = -float('inf')
	for i in range(n - 1, 2 * n):
		ans = max(ans, frnt[i] - back[i + 1])
	print(ans)
main()


import heapq
N = int(input())
a = [int(i) for i in input().split()]
hq = a[0:N]
left_max = [sum(hq)]
heapq.heapify(hq)
for i in range(N):
	left_max.append(left_max[i] + a[N + i] - heapq.heappushpop(hq, a[N + i]))
hq = [-i for i in a[2 * N:3 * N]]
right_min = [-sum(hq)]
heapq.heapify(hq)
for i in range(N):
	right_min.append(right_min[i] + a[2 * N - i - 1] + heapq.heappushpop(hq, -a[2 * N - i - 1]))
ans = -100000000000000
for i in range(N + 1):
	ans = max(ans, left_max[i] - right_min[N - i])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
aka = a[:n]
heapq.heapify(aka)
akasum = [0] * (n + 1)
akasum[0] = sum(aka)
ao = a[2 * n:]
aosum = [0] * (n + 1)
aosum[-1] = sum(ao)
for i in range(len(ao)):
	ao[i] = -ao[i]
heapq.heapify(ao)
for i in range(n, 2 * n):
	b = heapq.heappop(aka)
	if b >= a[i]:
		heapq.heappush(aka, b)
		akasum[i - n + 1] = akasum[i - n]
	else:
		heapq.heappush(aka, a[i])
		akasum[i - n + 1] = akasum[i - n] + a[i] - b
	b = heapq.heappop(ao)
	if b >= -a[-i - 1]:
		heapq.heappush(ao, b)
		aosum[-i + n - 2] = aosum[-i + n - 1]
	else:
		heapq.heappush(ao, -a[-i - 1])
		aosum[-i + n - 2] = aosum[-i + n - 1] + a[-i - 1] + b
ans = -float('inf')
for i in range(n + 1):
	kota = akasum[i] - aosum[i]
	ans = max(kota, ans)
print(ans)


INF = 10 ** 20
import sys
input = sys.stdin.readline
sys.setrecursionlimit(100000000)
dy = (-1, 0, 1, 0)
dx = (0, 1, 0, -1)
from heapq import heappop, heapify, heappush

def main():
	n = int(input())
	a = list(map(int, input().split()))
	lM = [0] * (n + 1)
	rm = [0] * (n + 1)
	q = []
	cumsum = 0
	for i in range(n):
		heappush(q, a[i])
		cumsum += a[i]
	lM[0] = cumsum
	drop = 0
	for i in range(n, 2 * n):
		heappush(q, a[i])
		drop += heappop(q)
		cumsum += a[i]
		lM[i - n + 1] = cumsum - drop
	q = []
	cumsum = 0
	for i in range(3 * n - 1, 2 * n - 1, -1):
		heappush(q, -a[i])
		cumsum += a[i]
	rm[-1] = cumsum
	drop = 0
	for i in range(2 * n - 1, n - 1, -1):
		heappush(q, -a[i])
		drop -= heappop(q)
		cumsum += a[i]
		rm[i - n] = cumsum - drop
	ans = -INF
	for i in range(n + 1):
		ans = max(ans, lM[i] - rm[i])
	print(ans)

def __starting_point():
	main()
__starting_point()


import heapq
N = int(input())
a = list(map(int, input().split()))
c_que = list(map(lambda x: x * -1, a[2 * N:]))
a_que = a[:N]
a_sum = sum(a_que)
c_sum = -sum(c_que)
heapq.heapify(a_que)
heapq.heapify(c_que)
ans = -10 ** 15
score = [[0, 0] for _ in range(N + 1)]
score[0][0] = a_sum
score[N][1] = c_sum
for i in range(N):
	heapq.heappush(a_que, a[N + i])
	heapq.heappush(c_que, -a[2 * N - 1 - i])
	a_sum = a_sum + a[N + i] - heapq.heappop(a_que)
	c_sum = c_sum + a[2 * N - 1 - i] + heapq.heappop(c_que)
	score[i + 1][0] = a_sum
	score[N - 1 - i][1] = c_sum
for i in range(N + 1):
	ans = max(ans, score[i][0] - score[i][1])
print(ans)


import heapq
n = int(input())
A = list(map(int, input().split()))
Left_top = A[:n]
Right_bottom = [-i for i in A[-n:]]
L = [0] * (n + 1)
R = [0] * (n + 1)
L[0] = sum(Left_top)
R[-1] = sum(Right_bottom)
heapq.heapify(Left_top)
heapq.heapify(Right_bottom)
for i in range(n, 2 * n):
	L[i - n + 1] = L[i - n] - heapq.heappushpop(Left_top, A[i]) + A[i]
	R[2 * n - i - 1] = R[2 * n - i] - heapq.heappushpop(Right_bottom, -A[-(i + 1)]) - A[-(i + 1)]
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, L[i] + R[i])
print(ans)


from heapq import heappush, heappop
N = int(input())
(*a,) = map(int, input().split())
a = [0] + a
(A, B) = (0, 0)
(As, Bs) = ([None] * (3 * N + 1), [None] * (3 * N + 1))
(l, r) = ([], [])
for p in range(1, N + 1):
	heappush(l, a[p])
A = sum(l)
As[N] = A
for p in range(N + 1, 2 * N + 1):
	heappush(l, a[p])
	b = heappop(l)
	A = A + a[p] - b
	As[p] = A
for p in range(2 * N + 1, 3 * N + 1)[::-1]:
	heappush(r, -a[p])
B = -sum(r)
Bs[2 * N + 1] = B
for p in range(N + 1, 2 * N + 1)[::-1]:
	heappush(r, -a[p])
	b = heappop(r)
	B = B + a[p] + b
	Bs[p] = B
ans = max((As[p] - Bs[p + 1] for p in range(N, 2 * N + 1)))
print(ans)


from heapq import heappush, heappushpop
N = int(input())
a = list(map(int, input().split()))
a_list_1 = []
a_list_2 = []
for i in a[0:N]:
	heappush(a_list_1, i)
for i in list(reversed(a))[0:N]:
	heappush(a_list_2, -i)
sum_1 = sum(a_list_1)
sum_2 = sum(a_list_2)
sum_arr_1 = [0] * (N + 1)
sum_arr_1[0] = sum_1
sum_arr_2 = [0] * (N + 1)
sum_arr_2[-1] = sum_2
for k in range(N, 2 * N):
	l = heappushpop(a_list_1, a[k])
	sum_1 += a[k] - l
	sum_arr_1[k - N + 1] = sum_1
for k in reversed(range(N, 2 * N)):
	l = heappushpop(a_list_2, -a[k])
	sum_2 += -a[k] - l
	sum_arr_2[k - N] = sum_2
max_score = float('-inf')
for (s1, s2) in zip(sum_arr_1, sum_arr_2):
	score = s1 + s2
	if score > max_score:
		max_score = score
print(max_score)


import heapq
n = int(input())
A = list(map(int, input().split()))
sa = 0
sb = 0
hf = []
hb = []
la = [[0] * 2 for i in range(n + 1)]
for i in range(n):
	sa += A[i]
	heapq.heappush(hf, A[i])
for i in range(2 * n, 3 * n):
	sb += A[i]
	heapq.heappush(hb, -A[i])
la[0][0] = sa
la[-1][-1] = sb
for i in range(n, 2 * n):
	now = A[i]
	now2 = A[-1 - i]
	heapq.heappush(hf, now)
	heapq.heappush(hb, -now2)
	h1 = heapq.heappop(hf)
	h2 = -heapq.heappop(hb)
	sa += now - h1
	sb += now2 - h2
	la[i - n + 1][0] = sa
	la[-i + n - 2][1] = sb
ans = -float('INF')
for (i, j) in la:
	ans = max(ans, i - j)
print(ans)


from heapq import heapify, heappush, heappop
n = int(input())
a = list(map(int, input().split()))
a1 = a[0:n]
a_m = a[n:2 * n]
a2 = [-x for x in a[2 * n:3 * n]]
a1_sums = [sum(a1)]
a2_sums = [sum(a2)]
heapify(a1)
heapify(a2)
for aa in a_m:
	heappush(a1, aa)
	p = heappop(a1)
	a1_sums.append(a1_sums[-1] + aa - p)
a_m.reverse()
for aa in a_m:
	heappush(a2, -aa)
	p = heappop(a2)
	a2_sums.append(a2_sums[-1] - aa - p)
max_val = -float('inf')
for i in range(0, n + 1):
	max_val = max(max_val, a1_sums[i] + a2_sums[n - i])
print(max_val)


import heapq
N = int(input())
A = list(map(int, input().split()))
l = A[0:N]
lsum = [sum(l)]
heapq.heapify(l)
for i in range(N, 2 * N):
	x = heapq.heappushpop(l, A[i])
	lsum.append(lsum[-1] + A[i] - x)
r = list(map(lambda x: -x, A[-N:N * 3]))
rsum = [sum(r)]
heapq.heapify(r)
for i in range(N, 2 * N):
	x = heapq.heappushpop(r, -A[3 * N - 1 - i])
	rsum.append(rsum[-1] - A[3 * N - 1 - i] - x)
ans = -9999999999999999
for i in range(len(rsum)):
	ans = max(ans, lsum[i] + rsum[len(rsum) - 1 - i])
print(ans)


def f(a):
	q = a[:n]
	s = sum(q)
	heapify(q)
	yield s
	for e in a[n:2 * n]:
		s += e - heappushpop(q, e)
		yield s
from heapq import *
(n, *a) = map(int, open(0).read().split())
print(max(map(sum, zip(f(a), list(f([-e for e in a[::-1]]))[::-1]))))


from heapq import *
N = int(input())
A = list(map(int, input().split()))
(L, C, R) = (A[:N], A[N:2 * N], A[2 * N:])
F = [sum(L)]
heapify(L)
for c in C:
	F.append(F[-1] + c - heappushpop(L, c))
R = [-r for r in R]
B = [sum(R)]
heapify(R)
for c in reversed(C):
	B.append(B[-1] - c - heappushpop(R, -c))
print(max((f + b for (f, b) in zip(F, reversed(B)))))


import sys

def input():
	return sys.stdin.readline().strip()
sys.setrecursionlimit(10 ** 9)
from heapq import heappush, heappushpop
N = int(input())
aN = list(map(int, input().split()))
mids = aN[N:N * 2]
L = []
R = []
for i in range(N):
	heappush(L, aN[i])
	heappush(R, -aN[i + N * 2])
l_sum = [0] * (N + 1)
l_sum[0] = sum(aN[:N])
for i in range(N):
	num = heappushpop(L, mids[i])
	l_sum[i + 1] = l_sum[i] + mids[i] - num
r_sum = [0] * (N + 1)
r_sum[N] = sum(aN[N * 2:])
for i in range(N - 1, -1, -1):
	num = -heappushpop(R, -mids[i])
	r_sum[i] = r_sum[i + 1] + mids[i] - num
ans = -float('inf')
for i in range(N + 1):
	ans = max(l_sum[i] - r_sum[i], ans)
print(ans)


import heapq

def score(init, cand):
	score = [0] * (n + 1)
	score[0] = sum(init)
	hp = init
	heapq.heapify(hp)
	for (i, ai) in enumerate(cand):
		if hp[0] < ai:
			min_a = heapq.heappop(hp)
			score[i + 1] = score[i] + (ai - min_a)
			heapq.heappush(hp, ai)
		else:
			score[i + 1] = score[i]
	return score
n = int(input())
a = list(map(int, input().split()))
minus_a = [-x for x in a[::-1]]
former_score = score(a[:n], a[n:2 * n])
latter_score = score(minus_a[:n], minus_a[n:2 * n])[::-1]
ans = max((x + y for (x, y) in zip(former_score, latter_score)))
print(ans)


import sys
input = sys.stdin.readline
n = int(input())
a = list(map(int, input().split()))
s = a[:n]
m = a[n:2 * n]
f = a[2 * n:]
ssum = sum(s)
fsum = sum(f)
import heapq
heapq.heapify(s)
ms = [0] * n
mf = [0] * n
for i in range(n):
	heapq.heappush(s, m[i])
	mn = heapq.heappop(s)
	ms[i] = mn
for i in range(n):
	f[i] *= -1
heapq.heapify(f)
for i in range(n - 1, -1, -1):
	heapq.heappush(f, -m[i])
	mx = -heapq.heappop(f)
	mf[i] = mx
srui = [0] * (n + 1)
srui[0] = ssum
for i in range(n):
	srui[i + 1] = srui[i] - ms[i] + m[i]
frui = [0] * (n + 1)
frui[-1] = fsum
for i in range(n, 0, -1):
	frui[i - 1] = frui[i] - mf[i - 1] + m[i - 1]
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, srui[i] - frui[i])
print(ans)


from heapq import heappush, heappop, heapify
n = int(input())
a = list(map(int, input().split()))
ans = -float('inf')
l = a[:n]
heapify(l)
t = sum(a[:n])
ls = [t]
for i in range(n, 2 * n):
	t += a[i]
	heappush(l, a[i])
	t -= heappop(l)
	ls.append(t)
r = [-i for i in a[2 * n:]]
heapify(r)
t = sum(a[2 * n:])
rs = [t]
for i in range(2 * n - 1, n - 1, -1):
	t += a[i]
	heappush(r, -a[i])
	t += heappop(r)
	rs.append(t)
for i in range(n + 1):
	ans = max(ans, ls[i] - rs[-i - 1])
print(ans)


from heapq import heappush, heappop, heappushpop
N = int(input())
A = [int(a) for a in input().split()]

def calc(L):
	s = sum(L[:N])
	h = []
	X = [s]
	for i in range(N):
		heappush(h, L[i])
	for i in range(N, 2 * N):
		s += L[i] - heappushpop(h, L[i])
		X.append(s)
	return X
B = calc(A)
C = calc([-a for a in A][::-1])[::-1]
print(max([B[i] + C[i] for i in range(N + 1)]))


import heapq
N = int(input())
A = list(map(int, input().split()))
L = A[:N]
heapq.heapify(L)
sum_L = [0] * (N + 1)
sum_L[0] = sum(L)
for i in range(N):
	min_L = heapq.heappushpop(L, A[N + i])
	sum_L[i + 1] = sum_L[i] + A[N + i] - min_L
R = A[N * 2:]
rev_R = list(map(lambda x: -x, R))
heapq.heapify(rev_R)
sum_R = [0] * (N + 1)
sum_R[N] = sum(R)
for i in range(N - 1, -1, -1):
	max_R = -heapq.heappushpop(rev_R, -A[N + i])
	sum_R[i] = sum_R[i + 1] + A[N + i] - max_R
ans = -10 ** 14
for i in range(N + 1):
	ans = max(ans, sum_L[i] - sum_R[i])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
func = lambda p: p * -1
b = list(map(func, a[:]))
l = [0] * (3 * n)
first = a[0:n]
second = b[2 * n:3 * n]
x = [0] * (3 * n)
y = [0] * (3 * n)
x[n - 1] = sum(first)
y[2 * n - 1] = sum(second)
heapq.heapify(first)
heapq.heapify(second)
for i in range(n, 2 * n):
	heapq.heappush(first, a[i])
	s = first[0]
	heapq.heappop(first)
	x[i] = x[i - 1] + a[i] - s
for i in range(n, 2 * n):
	heapq.heappush(second, b[-i - 1])
	t = second[0]
	heapq.heappop(second)
	y[-i - 2] = y[-i - 1] + b[-i - 1] - t
for i in range(n - 1, 2 * n):
	l[i] = x[i] + y[i]
print(max(l[n - 1:2 * n]))


from heapq import heapify, heappop, heappush
from collections import deque
n = int(input())
a = list(map(int, input().split()))
L = a[:n]
sum_l = [sum(L)]
heapify(L)
ML = a[n:2 * n]
ML = deque(ML)
R = list(map(lambda x: -1 * x, a[2 * n:]))
sum_r = [sum(R)]
heapify(R)
MR = list(map(lambda x: -1 * x, a[n:2 * n]))
MR = deque(MR)
for i in range(n):
	add_to_l = ML.popleft()
	heappush(L, add_to_l)
	subtract_to_l = heappop(L)
	t = sum_l[-1] + add_to_l - subtract_to_l
	sum_l.append(t)
for i in range(n):
	add_to_r = MR.pop()
	heappush(R, add_to_r)
	subtract_to_r = heappop(R)
	t = sum_r[-1] + add_to_r - subtract_to_r
	sum_r.append(t)
sum_r = sum_r[::-1]
ans = sum_l[0] + sum_r[0]
for i in range(1, n + 1):
	t = sum_l[i] + sum_r[i]
	ans = max(ans, t)
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
ans = -10 ** 15
h1 = a[:n]
h2 = [-a[i] for i in range(2 * n, 3 * n)]
heapq.heapify(h1)
heapq.heapify(h2)
h1sum = sum(a[:n])
h2sum = sum(a[2 * n:])
box1 = [h1sum]
box2 = [h2sum]
for i in range(1, n + 1):
	heapq.heappush(h1, a[n + i - 1])
	h1sum += a[n + i - 1] - heapq.heappop(h1)
	box1.append(h1sum)
for i in range(1, n + 1):
	heapq.heappush(h2, -a[2 * n - i])
	h2sum += a[2 * n - i] - -heapq.heappop(h2)
	box2.append(h2sum)
for i in range(n + 1):
	ans = max(ans, box1[i] - box2[n - i])
print(ans)


from heapq import heapify, heappushpop
(N, *a) = map(int, open(0).read().split())
hq1 = a[:N]
hq2 = [-ai for ai in a[-N:]]
heapify(hq1)
heapify(hq2)
sum1 = [sum(hq1)]
sum2 = [sum(hq2)]
for k in range(N, 2 * N):
	sum1.append(sum1[-1] + a[k] - heappushpop(hq1, a[k]))
	sum2.append(sum2[-1] - a[-k - 1] - heappushpop(hq2, -a[-k - 1]))
print(max(map(sum, zip(sum1, sum2[::-1]))))


import sys
INF = float('inf')
from collections import deque
import heapq

class MaxHeap(object):

	def __init__(self, x):
		self.heap = [-e for e in x]
		heapq.heapify(self.heap)

	def push(self, value):
		heapq.heappush(self.heap, -value)

	def pop(self):
		return -heapq.heappop(self.heap)

class MinHeap(object):

	def __init__(self, x):
		self.heap = [e for e in x]
		heapq.heapify(self.heap)

	def push(self, value):
		heapq.heappush(self.heap, value)

	def pop(self):
		return heapq.heappop(self.heap)

def solve(N: int, a: 'List[int]'):
	mae = MinHeap(a[:N])
	mae_tot = [sum(a[:N])]
	for curr in range(N, 2 * N):
		mae.push(a[curr])
		mmin = mae.pop()
		mae_tot.append(mae_tot[-1] + a[curr] - mmin)
	ushiro = MaxHeap(a[2 * N:])
	ushiro_tot = [sum(a[2 * N:])]
	for curr in range(2 * N - 1, N - 1, -1):
		ushiro.push(a[curr])
		umax = ushiro.pop()
		ushiro_tot.append(ushiro_tot[-1] + a[curr] - umax)
	m = -INF
	for (mt, ut) in zip(mae_tot, reversed(ushiro_tot)):
		m = max(m, mt - ut)
	print(m)
	return

def main():

	def iterate_tokens():
		for line in sys.stdin:
			for word in line.split():
				yield word
	tokens = iterate_tokens()
	N = int(next(tokens))
	a = [int(next(tokens)) for _ in range(3 * N)]
	solve(N, a)

def __starting_point():
	main()
__starting_point()


from collections import defaultdict
import sys, heapq, bisect, math, itertools, string
sys.setrecursionlimit(10 ** 8)
INF = float('inf')
mod = 10 ** 9 + 7
AtoZ = [chr(i) for i in range(65, 65 + 26)]
atoz = [chr(i) for i in range(97, 97 + 26)]
N = int(input())
aa = list(map(int, input().split()))
q_b = aa[:N]
q_a = list(map(lambda x: -x, aa[2 * N:]))
sum_b = [sum(q_b)]
sum_a = [sum(q_a)]
heapq.heapify(q_b)
heapq.heapify(q_a)
sum = sum_b[0]
for i in range(N, 2 * N):
	push = aa[i]
	pop = heapq.heappushpop(q_b, push)
	sum = sum - pop + push
	sum_b.append(sum)
sum = sum_a[0]
for i in range(2 * N - 1, N - 1, -1):
	push = -aa[i]
	pop = heapq.heappushpop(q_a, push)
	sum = sum - pop + push
	sum_a.append(sum)
ans = -INF
for i in range(N + 1):
	ans = max(ans, sum_b[i] + sum_a[N - i])
print(ans)


import heapq
n = int(input())
A = list(map(int, input().split()))
pre = [0] * (n + 1)
pre_list = [e for e in A[:n]]
heapq.heapify(pre_list)
pre_sum = sum(pre_list)
pre[0] = pre_sum
for i in range(n, 2 * n):
	small = heapq.heappushpop(pre_list, A[i])
	pre_sum += A[i] - small
	pre[i - n + 1] = pre_sum
suf = [0] * (n + 1)
suf_list = [-e for e in A[2 * n:]]
heapq.heapify(suf_list)
suf_sum = -sum(suf_list)
suf[-1] = suf_sum
for i in range(2 * n - 1, n - 1, -1):
	large = -heapq.heappushpop(suf_list, -A[i])
	suf_sum += A[i] - large
	suf[i - n] = suf_sum
print(max([pre[i] - suf[i] for i in range(n + 1)]))


N = int(input())
a = list(map(int, input().split()))
import heapq
hq = a[:N]
fsum = [0] * (N + 1)
fsum[0] = sum(hq)
heapq.heapify(hq)
for i in range(N):
	a_ = a[N + i]
	a_min = heapq.heappop(hq)
	if a_min < a_:
		fsum[i + 1] = fsum[i] - a_min + a_
		a_min = a_
	else:
		fsum[i + 1] = fsum[i]
	heapq.heappush(hq, a_min)
a = [-a[-i - 1] for i in range(3 * N)]
hq = a[:N]
lsum = [0] * (N + 1)
lsum[0] = sum(hq)
heapq.heapify(hq)
for i in range(N):
	a_ = a[N + i]
	a_min = heapq.heappop(hq)
	if a_min < a_:
		lsum[i + 1] = lsum[i] - a_min + a_
		a_min = a_
	else:
		lsum[i + 1] = lsum[i]
	heapq.heappush(hq, a_min)
lsum.reverse()
ans = -float('inf')
for i in range(N + 1):
	diff = fsum[i] + lsum[i]
	if ans < diff:
		ans = diff
print(ans)


from heapq import heappush, heappop
n = int(input())
a = list(map(int, input().split()))
s1 = [0] * 3 * n
pq = []
s = 0
for i in range(3 * n):
	if len(pq) < n:
		s += a[i]
		heappush(pq, a[i])
		if len(pq) == n:
			s1[i] = s
	else:
		s += a[i]
		heappush(pq, a[i])
		s -= heappop(pq)
		s1[i] = s
s2 = [0] * 3 * n
pq = []
s = 0
for i in reversed(range(3 * n)):
	if len(pq) < n:
		s += a[i]
		heappush(pq, -a[i])
		if len(pq) == n:
			s2[i] = s
	else:
		s += a[i]
		heappush(pq, -a[i])
		s -= -heappop(pq)
		s2[i] = s
ans = -10 ** 15
for i in range(n - 1, 2 * n):
	ans = max(ans, s1[i] - s2[i + 1])
print(ans)


import sys
from heapq import heapify, heappush, heappop

def input():
	return sys.stdin.readline().strip()

def list2d(a, b, c):
	return [[c] * b for i in range(a)]

def list3d(a, b, c, d):
	return [[[d] * c for j in range(b)] for i in range(a)]

def list4d(a, b, c, d, e):
	return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]

def ceil(x, y=1):
	return int(-(-x // y))

def INT():
	return int(input())

def MAP():
	return list(map(int, input().split()))

def LIST(N=None):
	return list(MAP()) if N is None else [INT() for i in range(N)]

def Yes():
	print('Yes')

def No():
	print('No')

def YES():
	print('YES')

def NO():
	print('NO')
sys.setrecursionlimit(10 ** 9)
INF = float('inf')
MOD = 10 ** 9 + 7
N = INT()
A = LIST()
A1 = A[:N]
A2 = A[N:N * 2]
A3 = [-a for a in A[N * 2:]]
heapify(A1)
heapify(A3)
ansa = [0] * (N + 1)
ansa[0] = sum(A1)
for i in range(N):
	heappush(A1, A2[i])
	ansa[i + 1] = ansa[i] + A2[i] - heappop(A1)
ansb = [0] * (N + 1)
ansb[N] = -sum(A3)
for i in range(N - 1, -1, -1):
	heappush(A3, -A2[i])
	ansb[i] = ansb[i + 1] + A2[i] - -heappop(A3)
ans = -INF
for i in range(N + 1):
	ans = max(ans, ansa[i] - ansb[i])
print(ans)


n = int(input())
a = list(map(int, input().split()))
import heapq as hq
f1 = [0] * (3 * n)
f1[n - 1] = sum(a[:n])
h = a[:n]
hq.heapify(h)
su = f1[n - 1]
for i in range(n, 2 * n):
	cur = a[i]
	x = hq.heappop(h)
	if cur > x:
		su -= x
		su += cur
		hq.heappush(h, cur)
	else:
		hq.heappush(h, x)
	f1[i] = su
f2 = [0] * (3 * n)
f2[2 * n] = sum(a[2 * n:])
su = f2[2 * n]
h2 = []
for i in a[2 * n:]:
	h2.append(-i)
hq.heapify(h2)
for i in range(2 * n - 1, n - 1, -1):
	cur = a[i]
	x = -1 * hq.heappop(h2)
	if cur < x:
		su -= x
		su += cur
		hq.heappush(h2, -cur)
	else:
		hq.heappush(h2, -x)
	f2[i] = su
ans = -float('inf')
for i in range(n - 1, 2 * n):
	ans = max(ans, f1[i] - f2[i + 1])
print(ans)


import heapq
n = int(input())
A = list(map(int, input().split()))
Q0 = []
Q1 = []
Ana = [0] * (3 * n)
M = [[A[n + i], n + i] for i in range(2 * n)]
M.sort()
msum = sum([M[i][0] for i in range(n)])
ans = sum(A[:n]) - msum
ans0 = ans
for i in range(n):
	heapq.heappush(Q0, A[i])
	heapq.heappush(Q1, [M[n + i][0], M[n + i][1]])
	Ana[M[n + i][1]] = 1
for i in range(n):
	if Ana[n + i] == 0:
		heapq.heappush(Q0, A[n + i])
		ans0 += A[n + i] * 2
		ochi = heapq.heappop(Q0)
		ans0 -= ochi
		agari = heapq.heappop(Q1)
		while Ana[agari[1]] == 0:
			agari = heapq.heappop(Q1)
		Ana[agari[1]] = 0
		ans0 -= agari[0]
	else:
		Ana[n + i] = 0
		heapq.heappush(Q0, A[n + i])
		ans0 += A[n + i]
		ochi = heapq.heappop(Q0)
		ans0 -= ochi
	ans = max(ans, ans0)
saigo = sum(sorted(A[:n * 2])[n:]) - sum(A[n * 2:])
ans = max(ans, saigo)
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
a1 = a[:n]
ax = a[n:2 * n]
a2 = list(map(lambda x: -x, a[2 * n:]))
sum_a1 = sum(a1)
fdif1 = [sum_a1]
heapq.heapify(a1)
for i in range(n):
	p = heapq.heappushpop(a1, ax[i])
	fdif1.append(fdif1[-1] + ax[i] - p)
sum_a2 = sum(a2)
fdif2 = [sum_a2]
heapq.heapify(a2)
for i in range(n):
	p = heapq.heappushpop(a2, -ax[-1 - i])
	fdif2.append(fdif2[-1] - ax[-1 - i] - p)
fdif2.reverse()
fdif = [fdif1[i] + fdif2[i] for i in range(n + 1)]
print(max(fdif))


import heapq
import sys
input = sys.stdin.readline

def solve():
	n = int(input())
	a = list((int(i) for i in input().split()))
	an = []
	a2n = a[n:2 * n]
	a3n = []
	for i in range(n):
		heapq.heappush(an, a[i])
		heapq.heappush(a3n, -1 * a[i + 2 * n])
	tmpsuman = sum(an)
	tmpsuma3n = -1 * sum(a3n)
	suman = [tmpsuman]
	suma3n = [tmpsuma3n]
	for i in range(n):
		tmp = a2n[i]
		tmpsuman += tmp
		heapq.heappush(an, tmp)
		tmpsuman -= heapq.heappop(an)
		suman.append(tmpsuman)
		tmp = a2n[n - i - 1]
		tmpsuma3n += tmp
		heapq.heappush(a3n, -1 * tmp)
		tmpsuma3n -= -1 * heapq.heappop(a3n)
		suma3n.append(tmpsuma3n)
	ans = -1 * float('INF')
	for i in range(n + 1):
		ans = max(ans, suman[i] - suma3n[n - i])
	print(ans)
solve()


import heapq
n = int(input())
a = list(map(int, input().split()))
(red, blue) = (a[:n], [-1 * i for i in a[2 * n:]])
(sr, sb) = (sum(red), sum(blue))
results = [0] * (n + 1)
results[0] = sr
results[-1] = sb
heapq.heapify(red)
heapq.heapify(blue)
for k in range(n, 2 * n):
	v = a[k]
	p = heapq.heappushpop(red, v)
	sr += v - p
	results[k - n + 1] += sr
for k in range(2 * n - 1, n - 1, -1):
	v = -1 * a[k]
	p = heapq.heappushpop(blue, v)
	sb += v - p
	results[k - n] += sb
print(max(results))


import heapq

def main():
	N = int(input())
	A = list(map(int, input().split()))
	fl = [i for i in A[:N]]
	f = [sum(A[:N])]
	heapq.heapify(fl)
	ll = [-i for i in A[2 * N:]]
	l = [sum(A[2 * N:])]
	heapq.heapify(ll)
	for i in range(N):
		s = f[-1]
		if A[N + i] > fl[0]:
			s = s - fl[0] + A[N + i]
			heapq.heappushpop(fl, A[N + i])
		f.append(s)
		s = l[-1]
		if -A[2 * N - 1 - i] > ll[0]:
			s = s + ll[0] + A[2 * N - 1 - i]
			heapq.heappushpop(ll, -A[2 * N - 1 - i])
		l.append(s)
	r = f[0] - l[-1]
	for i in range(N + 1):
		r = max(r, f[i] - l[-1 - i])
	return r
print(main())


import heapq
N = int(input())
(*A,) = map(int, input().split())
q = []
for a in A[:N]:
	heapq.heappush(q, a)
S1 = [sum(q)]
for a in A[N:N * 2]:
	if a > q[0]:
		S1.append(S1[-1] + a - q[0])
		heapq.heapreplace(q, a)
	else:
		S1.append(S1[-1])
q = []
for a in A[2 * N:]:
	heapq.heappush(q, -a)
S2 = [sum(q)]
for a in A[N:N * 2][::-1]:
	if a < -q[0]:
		S2.append(S2[-1] - a - q[0])
		heapq.heapreplace(q, -a)
	else:
		S2.append(S2[-1])
S2 = S2[::-1]
print(max(map(sum, zip(S1, S2))))


import heapq
N = int(input())
A = list(map(int, input().split()))
left = A[:N]
left_total = [sum(left)]
heapq.heapify(left)
for i in range(N, 2 * N):
	l = heapq.heappop(left)
	if l < A[i]:
		heapq.heappush(left, A[i])
		left_total.append(left_total[-1] - l + A[i])
	else:
		heapq.heappush(left, l)
		left_total.append(left_total[-1])
right = [-i for i in A[2 * N:]]
right_total = [sum(right)]
heapq.heapify(right)
for i in reversed(range(N, 2 * N)):
	r = heapq.heappop(right)
	if r < -A[i]:
		heapq.heappush(right, -A[i])
		right_total.append(right_total[-1] - r - A[i])
	else:
		heapq.heappush(right, r)
		right_total.append(right_total[-1])
right_total = right_total[::-1]
ans = -float('inf')
for i in range(len(left_total)):
	ans = max(ans, left_total[i] + right_total[i])
print(ans)


from heapq import heappop, heappush
n = int(input())
a = list(map(int, input().split()))
p = sum(a[2 * n:])
right_min = [p]
hq = []
for i in range(2 * n, 2 * n + n):
	heappush(hq, -a[i])
for i in range(n):
	p += a[-n - i - 1]
	heappush(hq, -a[-n - i - 1])
	p += heappop(hq)
	right_min.append(p)
l = sum(a[:n])
hq = []
for i in range(n):
	heappush(hq, a[i])
right_min.reverse()
ans = l - right_min[0]
for i in range(n):
	l += a[n + i]
	heappush(hq, a[n + i])
	l -= heappop(hq)
	ans = max(ans, l - right_min[i + 1])
print(ans)


from heapq import heapify, heapreplace
n = int(input())
a = list(map(int, input().split()))
a1 = a[:n]
heapify(a1)
a2 = a[n:2 * n]
a3 = [-i for i in a[2 * n:]]
heapify(a3)
b1 = [sum(a1)]
b2 = [sum(a3)]
for i in range(n):
	b1.append(a2[i] - heapreplace(a1, a2[i]))
	b2.append(-heapreplace(a3, -a2[n - i - 1]) - a2[n - i - 1])
for i in range(n):
	b1[i + 1] += b1[i]
	b2[i + 1] += b2[i]
accu = []
mx = b1[0]
for i in b1:
	mx = max(mx, i)
	accu.append(mx)
ans = -10 ** 16
mx = b2[0]
for i in range(n + 1):
	mx = max(mx, b2[i])
	ans = max(ans, mx + accu[n - i])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
L = A[:N]
heapq.heapify(L)
Lmax = [0] * (N + 1)
Lsum = sum(L)
Lmax[0] = Lsum
for i in range(N, 2 * N):
	m = heapq.heappushpop(L, A[i])
	Lsum += A[i] - m
	Lmax[i - N + 1] = Lsum
R = [-x for x in A[2 * N:]]
heapq.heapify(R)
Rmin = [0] * (N + 1)
Rsum = -sum(R)
Rmin[N] = Rsum
for i in range(2 * N - 1, N - 1, -1):
	M = -heapq.heappushpop(R, -A[i])
	Rsum -= M - A[i]
	Rmin[i - N] = Rsum
print(max((Lmax[i] - Rmin[i] for i in range(N + 1))))


from heapq import heapify, heappushpop
from heapq import _heapify_max as heapify_max, _siftup_max

def heappushpop_max(heap, item):
	if heap and heap[0] > item:
		(item, heap[0]) = (heap[0], item)
		_siftup_max(heap, 0)
	return item
(N, *a_list) = map(int, open(0).read().split())
left_pq = a_list[:N]
right_pq = a_list[2 * N:]
heapify(left_pq)
heapify_max(right_pq)
left_sum = [sum(left_pq)]
right_sum = [sum(right_pq)]
for k in range(N, 2 * N):
	left_item = a_list[k]
	right_item = a_list[-k - 1]
	left_sum.append(left_sum[-1] - heappushpop(left_pq, left_item) + left_item)
	right_sum.append(right_sum[-1] - heappushpop_max(right_pq, right_item) + right_item)
max_sum = max(map(sum, zip(left_sum, [-item for item in right_sum[::-1]])))
print(max_sum)


import heapq
n = int(input())
(*a,) = map(int, input().split())
lq = []
lsum = 0
for i in range(n):
	heapq.heappush(lq, a[i])
	lsum += a[i]
l = [0] * (3 * n)
l[n - 1] = lsum
for i in range(n, 2 * n):
	lsum += a[i]
	heapq.heappush(lq, a[i])
	lsum -= heapq.heappop(lq)
	l[i] = lsum
rq = []
rsum = 0
for i in range(3 * n - 1, 2 * n - 1, -1):
	heapq.heappush(rq, -a[i])
	rsum += a[i]
r = [0] * (3 * n)
r[2 * n] = rsum
for i in range(2 * n - 1, n - 1, -1):
	rsum += a[i]
	heapq.heappush(rq, -a[i])
	rsum += heapq.heappop(rq)
	r[i] = rsum
ans = -10 ** 15
for i in range(n - 1, 2 * n):
	ans = max(ans, l[i] - r[i + 1])
print(ans)


import heapq
N = int(input())
li = [int(it) for it in input().split()]
X = li[:N]
sX = [0] * (N + 1)
sX[0] = sum(X)
heapq.heapify(X)
for i in range(N):
	pu = li[N + i]
	heapq.heappush(X, pu)
	po = heapq.heappop(X)
	sX[1 + i] = sX[i] + pu - po
li = [-li[3 * N - 1 - i] for i in range(3 * N)]
Y = li[:N]
sY = [0] * (N + 1)
sY[0] = sum(Y)
heapq.heapify(Y)
for i in range(N):
	pu = li[N + i]
	heapq.heappush(Y, pu)
	po = heapq.heappop(Y)
	sY[1 + i] = sY[i] + pu - po
s = -100000000000000000000000
for i in range(N + 1):
	s = max(sX[i] + sY[N - i], s)
print(s)


from heapq import heappop, heappush
inf = float('inf')
N = int(input())
A = list(map(int, input().split()))
sum_max = [0] * (3 * N + 1)
sum_min = [0] * (3 * N + 1)

def init_max():
	res = 0
	hq = []
	for (i, a) in enumerate(A):
		if len(hq) < N:
			heappush(hq, a)
			res += a
		elif hq[0] < a:
			res -= heappop(hq)
			heappush(hq, a)
			res += a
		sum_max[i + 1] = res

def init_min():
	res = 0
	hq = []
	for (i, a) in enumerate(A[::-1]):
		if len(hq) < N:
			heappush(hq, -a)
			res += a
		elif -hq[0] > a:
			res -= -heappop(hq)
			heappush(hq, -a)
			res += a
		sum_min[i + 1] = res
init_max()
init_min()
ans = -inf
for k in range(N, 2 * N + 1):
	res = sum_max[k] - sum_min[3 * N - k]
	ans = max(ans, res)
print(ans)


import sys
sys.setrecursionlimit(4100000)
import math
import itertools
INF = 10 ** 20
from heapq import heapify, heappop, heappush

def main():
	n = int(input())
	A = list(map(int, input().split()))
	L = A[:n]
	R = A[2 * n:]
	R = list(map(lambda x: x * -1, R))
	sum_l = [sum(L)]
	sum_r = [sum(R)]
	heapify(L)
	heapify(R)
	for i in range(n):
		elem = A[n + i]
		heappush(L, elem)
		sum_l.append(sum_l[-1] + elem - heappop(L))
	for i in range(n):
		elem = -A[2 * n - 1 - i]
		heappush(R, elem)
		sum_r.append(sum_r[-1] + elem - heappop(R))
	ans = -INF
	sum_r = sum_r[::-1]
	for i in range(len(sum_l)):
		ans = max(ans, sum_l[i] + sum_r[i])
	print(ans)
main()


def f(a):
	s = 0
	q = []
	for i in range(n):
		s += a[i]
		heappush(q, a[i])
	r = [s]
	for i in range(n, 2 * n):
		s += a[i]
		s -= heappushpop(q, a[i])
		r += [s]
	return r
import sys
from heapq import *
(n, *a) = list(map(int, sys.stdin.read().split()))
print(max(map(sum, zip(f(a), list(reversed(f(list(reversed([-e for e in a])))))))))


from heapq import heappop, heappush, heapify
N = int(input())
A = list(map(int, input().split()))
L = A[:N]
heapify(L)
sumL = [sum(A[:N])]
for i in range(N):
	x = heappop(L)
	if x < A[N + i]:
		sumL.append(sumL[-1] - x + A[N + i])
		heappush(L, A[N + i])
	else:
		sumL.append(sumL[-1])
		heappush(L, x)
R = list(map(lambda x: -x, A[2 * N:]))
heapify(R)
sumR = [sum(A[2 * N:])]
for i in range(N):
	x = -heappop(R)
	if x > A[2 * N - 1 - i]:
		sumR.append(sumR[-1] - x + A[2 * N - 1 - i])
		heappush(R, -A[2 * N - 1 - i])
	else:
		sumR.append(sumR[-1])
		heappush(R, -x)
res = -10 ** 18
for i in range(N + 1):
	res = max(res, sumL[i] - sumR[-1 - i])
print(res)


from heapq import heappush, heappop
n = int(input())
a = [int(_) for _ in input().split()]
fh = []
lh = []
for i in range(n):
	heappush(fh, a[i])
	heappush(lh, -1 * a[-i - 1])
f = [sum(fh)]
l = [-1 * sum(lh)]
for i in range(n, 2 * n):
	heappush(fh, a[i])
	f.append(f[-1] + a[i] - heappop(fh))
	heappush(lh, -1 * a[-i - 1])
	l.append(l[-1] + a[-i - 1] + heappop(lh))
ans = -10 ** 15
for (i, j) in zip(f, l[::-1]):
	ans = max(ans, i - j)
print(ans)


import heapq
N = int(input())
a = [int(i) for i in input().split()]
before = []
after = []
before_sum = 0
after_sum = 0
for i in range(N):
	heapq.heappush(before, a[i])
	before_sum += a[i]
for i in range(2 * N, 3 * N):
	heapq.heappush(after, -a[i])
	after_sum -= a[i]
c = [0] * (N + 1)
c[0] = before_sum
c[N] = after_sum
for i in range(N):
	before_sum = before_sum - heapq.heappushpop(before, a[N + i]) + a[N + i]
	c[i + 1] += before_sum
	after_sum = after_sum - heapq.heappushpop(after, -a[2 * N - i - 1]) - a[2 * N - i - 1]
	c[N - i - 1] += after_sum
print(max(c))


import heapq
N = int(input())
a = list(map(int, input().split()))
lq = []
lsum = 0
rq = []
rsum = 0
for i in range(N):
	heapq.heappush(lq, a[i])
	lsum += a[i]
	heapq.heappush(rq, -1 * a[3 * N - 1 - i])
	rsum += a[3 * N - 1 - i]
llis = []
rlis = []
for i in range(N + 1):
	llis.append(lsum)
	rlis.append(rsum)
	heapq.heappush(lq, a[N + i])
	heapq.heappush(rq, -1 * a[2 * N - 1 - i])
	lsum += a[N + i]
	rsum += a[2 * N - 1 - i]
	lpop = heapq.heappop(lq)
	rpop = -1 * heapq.heappop(rq)
	lsum -= lpop
	rsum -= rpop
rlis.reverse()
ans = -1 * float('inf')
for i in range(N + 1):
	ans = max(ans, llis[i] - rlis[i])
print(ans)


n = int(input())
a = list(map(int, input().split()))
l = [0] * 3 * n
r = [-1000000000000000] * 3 * n
from heapq import heappop, heappush
h = []
s = 0
for i in a[:n]:
	heappush(h, i)
	s += i
l[n - 1] = s
for i in range(n, 2 * n):
	heappush(h, a[i])
	s += a[i]
	s -= heappop(h)
	l[i] = s
h = []
s = 0
for i in a[2 * n:]:
	heappush(h, -i)
	s += -i
for i in range(2 * n - 1, n - 2, -1):
	r[i] = s
	heappush(h, -a[i])
	s += -a[i]
	s -= heappop(h)
print(max((l[i] + r[i] for i in range(3 * n))))


import heapq
N = int(input())
A = [int(_) for _ in input().split()]
X = A[0:N]
B = A[N:2 * N]
Y = [-_ for _ in A[2 * N:3 * N]]
heapq.heapify(X)
heapq.heapify(Y)
x = [sum(X)]
y = [sum(Y)]
for i in range(N):
	x += [B[i] - heapq.heappushpop(X, B[i])]
	y += [-B[-1 - i] - heapq.heappushpop(Y, -B[-1 - i])]
for i in range(N):
	x[i + 1] = x[i] + x[i + 1]
	y[i + 1] = y[i] + y[i + 1]
print(max([x[_] + y[-1 - _] for _ in range(N + 1)]))


import heapq
N = int(input())
A = list(map(int, input().split()))
A_rev = [-x for x in A[::-1]]
(left, right) = (A[:N], A_rev[:N])
(sum_left_list, sum_right_list) = ([0] * (N + 1), [0] * (N + 1))
(sum_left, sum_right) = (sum(left), sum(right))
(sum_left_list[0], sum_right_list[0]) = (sum_left, sum_right)
heapq.heapify(left)
heapq.heapify(right)
for k in range(N, 2 * N):
	val = A[k]
	heapq.heappush(left, val)
	min_val = heapq.heappop(left)
	sum_left += val
	sum_left -= min_val
	sum_left_list[k - N + 1] = sum_left
for k in range(N, 2 * N):
	val = A_rev[k]
	heapq.heappush(right, val)
	min_val = heapq.heappop(right)
	sum_right += val
	sum_right -= min_val
	sum_right_list[k - N + 1] = sum_right
sum_right_list = sum_right_list[::-1]
ans = -float('inf')
for i in range(N + 1):
	ans = max(ans, sum_left_list[i] + sum_right_list[i])
print(ans)


import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)
from heapq import heappop, heappush
(n, *a) = map(int, read().split())
a_rev = list(map(lambda x: int(x) * -1, a[::-1]))

def get_sum_list(a):
	h = []
	res = []
	cnt = 0
	for (i, aa) in enumerate(a[:2 * n]):
		heappush(h, aa)
		cnt += aa
		if i >= n:
			cnt -= heappop(h)
		if i >= n - 1:
			res.append(cnt)
	return res
left = get_sum_list(a)
right = get_sum_list(a_rev)
ans = -float('inf')
for i in range(n + 1):
	memo = left[i] + right[n - i]
	if ans < memo:
		ans = memo
print(ans)


import math, string, itertools, fractions, heapq, collections, re, array, bisect, sys, random, time, copy, functools
from collections import deque
sys.setrecursionlimit(10 ** 7)
inf = 10 ** 20
mod = 10 ** 9 + 7
DR = [1, -1, 0, 0]
DC = [0, 0, 1, -1]

def LI():
	return [int(x) for x in sys.stdin.readline().split()]

def LI_():
	return [int(x) - 1 for x in sys.stdin.readline().split()]

def LF():
	return [float(x) for x in sys.stdin.readline().split()]

def LS():
	return sys.stdin.readline().split()

def I():
	return int(sys.stdin.readline())

def F():
	return float(sys.stdin.readline())

def S():
	return input()

def main():
	N = I()
	A = LI()
	wakeme = N
	Aleftsum = [0 for _ in range(3 * N + 1)]
	Arightsum = [0 for _ in range(3 * N + 1)]
	leftA = [x for x in A[:N]]
	rightA = [-x for x in A[-N:]]
	heapq.heapify(leftA)
	heapq.heapify(rightA)
	lsum = sum(leftA)
	rsum = sum(rightA)
	Aleftsum[wakeme] = lsum
	Arightsum[2 * N] = -rsum
	for i in range(N):
		newl = A[wakeme + i]
		lsum += newl
		lsum -= heapq.heappushpop(leftA, newl)
		Aleftsum[wakeme + i + 1] = lsum
		newr = A[2 * N - 1 - i]
		rsum -= newr
		rsum -= heapq.heappushpop(rightA, -newr)
		Arightsum[2 * N - 1 - i] = -rsum
	ans = -inf
	for i in range(N, 2 * N + 1):
		ans = max(ans, Aleftsum[i] - Arightsum[i])
	print(ans)
main()


import heapq
n = int(input())
A = [int(i) for i in input().split()]
AL = A[:n]
AR = [0] * n
for i in range(2 * n, 3 * n):
	AR[i - 2 * n] -= A[i]
(ALS, ARS) = ([0] * (n + 1), [0] * (n + 1))
(ALS[0], ARS[0]) = (sum(AL), sum(AR))
heapq.heapify(AL)
heapq.heapify(AR)
for i in range(n):
	(l, r) = (A[n + i], -A[2 * n - i - 1])
	heapq.heappush(AL, l)
	ALS[i + 1] = ALS[i] + l - heapq.heappop(AL)
	heapq.heappush(AR, r)
	ARS[i + 1] = ARS[i] + r - heapq.heappop(AR)
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, ALS[i] + ARS[n - i])
print(ans)


from heapq import heappush, heappop
n = int(input())
a = list(map(int, input().split()))
max_sum_fh = [0] * (n + 1)
min_sum_lh = [0] * (n + 1)
hq_fh = []
hq_lh = []
for i in range(n):
	heappush(hq_fh, a[i])
	heappush(hq_lh, -a[-1 - i])
max_sum_fh[0] = sum(hq_fh)
min_sum_lh[n] = -sum(hq_lh)
for i in range(n):
	if a[i + n] > hq_fh[0]:
		value_in = a[i + n]
		value_out = heappop(hq_fh)
		heappush(hq_fh, value_in)
		max_sum_fh[i + 1] = max_sum_fh[i] - value_out + value_in
	else:
		max_sum_fh[i + 1] = max_sum_fh[i]
	if -a[-1 - i - n] > hq_lh[0]:
		value_in = -a[-1 - i - n]
		value_out = heappop(hq_lh)
		heappush(hq_lh, value_in)
		min_sum_lh[-2 - i] = min_sum_lh[-1 - i] + value_out - value_in
	else:
		min_sum_lh[-2 - i] = min_sum_lh[-1 - i]
print(max([max_sum_fh[i] - min_sum_lh[i] for i in range(n + 1)]))


import heapq
n = int(input())
a = list(map(int, input().split()))
score = [[0, 0] for _ in range(n + 1)]
h1 = a[0:n]
h2 = [-a[2 * n + i] for i in range(n)]
maxscore = sum(h1)
minscore = -sum(h2)
heapq.heapify(h1)
heapq.heapify(h2)
score[0][0] = maxscore
score[n][1] = minscore
for i in range(n):
	heapq.heappush(h1, a[n + i])
	heapq.heappush(h2, -a[2 * n - 1 - i])
	maxscore = maxscore + a[n + i] - heapq.heappop(h1)
	minscore = minscore + a[2 * n - 1 - i] + heapq.heappop(h2)
	score[i + 1][0] = maxscore
	score[n - 1 - i][1] = minscore
ans = -pow(10, 15)
for i in range(n + 1):
	ans = max(ans, score[i][0] - score[i][1])
print(ans)


import heapq
import sys
try:
	from typing import List
except ImportError:
	pass

def solve(N: int, a: 'List[int]'):
	h = a[:N]
	heapq.heapify(h)
	l1 = [0] * (N + 1)
	l1[0] = sum(h)
	for i in range(N):
		m = heapq.heappushpop(h, a[N + i])
		l1[i + 1] = l1[i] + a[N + i] - m
	h = [-ai for ai in a[-N:]]
	heapq.heapify(h)
	l2 = [0] * (N + 1)
	l2[N] = sum(h)
	for i in reversed(list(range(N))):
		m = heapq.heappushpop(h, -a[N + i])
		l2[i] = l2[i + 1] + -a[N + i] - m
	print(max((l1[i] + l2[i] for i in range(N + 1))))

def main():

	def iterate_tokens():
		for line in sys.stdin:
			for word in line.split():
				yield word
	tokens = iterate_tokens()
	N = int(next(tokens))
	a = [int(next(tokens)) for _ in range(3 * N)]
	solve(N, a)

def __starting_point():
	main()
__starting_point()


import heapq
n = int(input())
a = list(map(int, input().split()))
pres = a[:n]
heapq.heapify(pres)
apresum = [0] * (n + 1)
aps = sum(pres)
apresum[0] = aps
posts = list(map(lambda x: -1 * x, a[::-1][:n]))
heapq.heapify(posts)
apossum = [0] * (n + 1)
aqs = sum(posts)
apossum[0] = aqs
for i in range(1, n + 1):
	tempprea = a[n + i - 1]
	tempposta = -1 * a[2 * n - i]
	heapq.heappush(pres, tempprea)
	tempprepop = heapq.heappop(pres)
	aps += tempprea - tempprepop
	apresum[i] = aps
	heapq.heappush(posts, tempposta)
	temppostpop = heapq.heappop(posts)
	aqs += tempposta - temppostpop
	apossum[i] = aqs
print(max([x + y for (x, y) in zip(apresum, apossum[::-1])]))


import heapq
N = int(input())
A = [int(x) for x in input().split()]
a = A[:N]
b = A[-N:]
c = A[N:-N]
res = [sum(a)]
heapq.heapify(a)
for i in range(N):
	heapq.heappush(a, c[i])
	k = heapq.heappop(a)
	res.append(res[-1] + c[i] - k)
cnt = sum(b)
for i in range(N):
	b[i] *= -1
max_ans = res[N] - cnt
heapq.heapify(b)
for i in range(N - 1, -1, -1):
	heapq.heappush(b, -c[i])
	k = heapq.heappop(b)
	res[i] -= cnt + c[i] + k
	cnt = cnt + c[i] + k
	max_ans = max(max_ans, res[i])
print(max_ans)


import heapq
N = int(input())
d = list(map(int, input().split()))
d_rev = d[::-1]
d1 = d[:N]
heapq.heapify(d1)
d2 = [-i for i in d_rev[:N]]
heapq.heapify(d2)
sum_d1 = sum(d1)
sum_d2 = sum(d2)
sum_d1_arr = [sum_d1]
sum_d2_arr = [sum_d2]
for k in range(N, 2 * N):
	c = sum_d1_arr[-1]
	c += d[k]
	n = heapq.heappushpop(d1, d[k])
	c -= n
	sum_d1_arr.append(c)
	e = sum_d2_arr[-1]
	e += -d_rev[k]
	n = heapq.heappushpop(d2, -1 * d_rev[k])
	e -= n
	sum_d2_arr.append(e)
print(max((v + w for (v, w) in zip(sum_d1_arr, sum_d2_arr[::-1]))))


import sys
from heapq import heapify, heappush, heappop

def input():
	return sys.stdin.readline().strip()

def list2d(a, b, c):
	return [[c] * b for i in range(a)]

def list3d(a, b, c, d):
	return [[[d] * c for j in range(b)] for i in range(a)]

def list4d(a, b, c, d, e):
	return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]

def ceil(x, y=1):
	return int(-(-x // y))

def INT():
	return int(input())

def MAP():
	return list(map(int, input().split()))

def LIST(N=None):
	return list(MAP()) if N is None else [INT() for i in range(N)]

def Yes():
	print('Yes')

def No():
	print('No')

def YES():
	print('YES')

def NO():
	print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 18
MOD = 10 ** 9 + 7
N = INT()
A = LIST()
A1 = A[:N]
A2 = A[N:]
sm1 = sum(A1)
sm2 = sum(A2)
que1 = []
que2 = []
S = set()
for (i, a) in enumerate(A1):
	que1.append((a, i))
heapify(que1)
A2 = [(a, i) for (i, a) in enumerate(A2, N)]
A2.sort(reverse=1)
for (a, i) in A2[:N]:
	sm2 -= a
	S.add(i)
	que2.append((a, i))
heapify(que2)
ans = sm1 - sm2
for i in range(N, N * 2):
	heappush(que1, (A[i], i))
	sm1 += A[i]
	(a, _) = heappop(que1)
	sm1 -= a
	if i not in S:
		sm2 -= A[i]
		while 1:
			(a, j) = heappop(que2)
			S.remove(j)
			if j > i:
				sm2 += a
				break
	ans = max(ans, sm1 - sm2)
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
l_sum = [0 for _ in range(n + 1)]
r_sum = [0 for _ in range(n + 1)]
que = a[:n]
l_sum[0] = sum(que)
heapq.heapify(que)
for i in range(n):
	l_sum[i + 1] = l_sum[i]
	if que[0] < a[n + i]:
		l_sum[i + 1] += a[n + i] - que[0]
		heapq.heappop(que)
		heapq.heappush(que, a[n + i])
que = [-a[i] for i in range(2 * n, 3 * n)]
r_sum[0] = -sum(que)
heapq.heapify(que)
for i in range(n):
	r_sum[i + 1] = r_sum[i]
	if -que[0] > a[2 * n - 1 - i]:
		r_sum[i + 1] += a[2 * n - 1 - i] + que[0]
		heapq.heappop(que)
		heapq.heappush(que, -a[2 * n - 1 - i])
ans = -1000000000000000.0
for x in range(n + 1):
	ans = max(ans, l_sum[x] - r_sum[n - x])
print(ans)


import sys, heapq
(n, *a) = list(map(int, sys.stdin.read().split()))

def f(l, m, n, d):
	s = 0
	q = []
	for i in range(l, m, d):
		s += a[i]
		heapq.heappush(q, a[i] * d)
	r = [s]
	for i in range(m, n, d):
		s += a[i]
		heapq.heappush(q, a[i] * d)
		s -= heapq.heappop(q) * d
		r.append(s)
	return r
ra = f(0, n, 2 * n, 1)
rb = reversed(f(3 * n - 1, 2 * n - 1, n - 1, -1))
print(max((x - y for (x, y) in zip(ra, rb))))


def main():
	from heapq import heappush, heappushpop
	n = int(input())
	(*a,) = list(map(int, input().split()))
	to_rm = [0] * (n * 3)
	h = []
	for x in a[:n]:
		heappush(h, x)
	mid = tuple(enumerate(a[n:n * 2], n))
	t = 0
	for (i, x) in mid:
		mi = heappushpop(h, x)
		t += mi
		to_rm[i] = -t
	h = []
	for x in a[n * 2:n * 3]:
		heappush(h, -x)
	t = 0
	for (i, x) in reversed(mid):
		ma = -heappushpop(h, -x)
		t += ma
		to_rm[i - 1] += t
	tot = sum(a)
	ret = -10 ** 30
	s = sum(a[:n - 1])
	for tail in range(n - 1, n * 2):
		s += a[tail]
		ret = max(ret, s - (tot - s) + to_rm[tail])
	print(ret)

def __starting_point():
	main()
__starting_point()


from heapq import heappush, heappop, heapify
import sys
input = sys.stdin.readline
N = int(input())
a = [int(i) for i in input().split()]
dpl = [0] * (N * 3)
dpr = [0] * (N * 3)
l = [a[i] for i in range(N)]
r = [-a[i] for i in range(2 * N, 3 * N)]
heapify(l)
heapify(r)
dpl[N - 1] = sum(l)
for i in range(N, 2 * N):
	heappush(l, a[i])
	m = heappop(l)
	dpl[i] = dpl[i - 1] + a[i] - m
dpr[2 * N] = -sum(r)
for i in range(2 * N - 1, N - 1, -1):
	heappush(r, -a[i])
	M = heappop(r)
	dpr[i] = dpr[i + 1] + a[i] + M
M = -float('inf')
for i in range(N - 1, 2 * N):
	M = max(M, dpl[i] - dpr[i + 1])
print(M)


from heapq import *
n = int(input())
a = list(map(int, input().split()))
left = a[:n]
right = a[2 * n:]
heapify(left)
l = [sum(left)]
r = [sum(right)]
sl = sum(left)
sr = sum(right)
for i in range(n):
	k = heappop(left)
	sl -= k
	heappush(left, max(k, a[n + i]))
	sl += max(k, a[n + i])
	l.append(sl)
right = [-i for i in right]
heapify(right)
for i in range(n):
	k = -heappop(right)
	sr -= k
	mini = min(k, a[2 * n - 1 - i])
	heappush(right, -mini)
	sr += mini
	r.append(sr)
r.reverse()
ans = -10 ** 15
for i in range(n + 1):
	ans = max(l[i] - r[i], ans)
print(ans)


import heapq
n = int(input())
arr = list(map(int, input().split()))
q1 = []
tmp = 0
for val in arr[:n]:
	heapq.heappush(q1, val)
	tmp += val
sum1 = [tmp]
for val in arr[n:2 * n]:
	tmp = heapq.heappop(q1)
	if val > tmp:
		heapq.heappush(q1, val)
		sum1.append(sum1[-1] + (val - tmp))
	else:
		heapq.heappush(q1, tmp)
		sum1.append(sum1[-1])
q2 = []
tmp = 0
for val in arr[2 * n:]:
	heapq.heappush(q2, -val)
	tmp += val
sum2 = [tmp]
for val in arr[2 * n - 1:n - 1:-1]:
	tmp = -heapq.heappop(q2)
	if val < tmp:
		heapq.heappush(q2, -val)
		sum2.append(sum2[-1] + (val - tmp))
	else:
		heapq.heappush(q2, -tmp)
		sum2.append(sum2[-1])
sum2 = sum2[::-1]
ans = -10 ** 18
for i in range(n + 1):
	tmp = sum1[i] - sum2[i]
	ans = max(ans, tmp)
print(ans)


import sys
import heapq

def main():
	rl = sys.stdin.readline
	n = int(rl().strip())
	a = list(map(int, rl().strip().split()))
	b = [-x for x in a]
	b.reverse()
	fl = a[:n]
	fs = sum(fl)
	ll = b[:n]
	ls = sum(ll)
	fdl = [0] * (n + 1)
	ldl = [0] * (n + 1)
	heapq.heapify(fl)
	heapq.heapify(ll)
	for i in range(1, n + 1):
		fmn = heapq.heappushpop(fl, a[n + i - 1])
		lmn = heapq.heappushpop(ll, b[n + i - 1])
		fdl[i] = fdl[i - 1] + a[n + i - 1] - fmn
		ldl[i] = ldl[i - 1] + b[n + i - 1] - lmn
	ldl.reverse()
	dif = max([x + y for (x, y) in zip(fdl, ldl)])
	print(fs + ls + dif)
main()


N = int(input())
A = list(map(int, input().split()))
S = []
P = A[:N]
Q = A[2 * N:]
for i in range(N):
	Q[i] *= -1
R = A[N:2 * N]
p = [0] * (N + 1)
q = [0] * (N + 1)
import heapq
heapq.heapify(P)
heapq.heapify(Q)
sp = sum(P)
sq = sum(Q)
p[0] = sp
q[0] = sq
for i in range(1, N + 1):
	heapq.heappush(P, R[i - 1])
	x = heapq.heappop(P)
	heapq.heappush(Q, -R[-i])
	y = heapq.heappop(Q)
	sp = sp + R[i - 1] - x
	sq = sq - R[-i] - y
	p[i] = sp
	q[i] = sq
ans = -10 ** 100
for k in range(N + 1):
	ans = max(ans, p[k] + q[N - k])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
s1 = sum(a[:n])
hq1 = a[:n]
heapq.heapify(hq1)
A = [s1]
for i in range(n, 2 * n):
	s1 += a[i]
	heapq.heappush(hq1, a[i])
	x = heapq.heappop(hq1)
	s1 -= x
	A.append(s1)
a = a[::-1]
s2 = sum(a[:n])
hq2 = [-a[i] for i in range(n)]
heapq.heapify(hq2)
B = [s2]
for i in range(n, 2 * n):
	s2 += a[i]
	heapq.heappush(hq2, -a[i])
	x = heapq.heappop(hq2)
	s2 -= -x
	B.append(s2)
B = B[::-1]
ans = -10 ** 18
for i in range(len(A)):
	ans = max(ans, A[i] - B[i])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
f = A[:N]
heapq.heapify(f)
S = sum(f)
fs = [S]
for i in range(N):
	a = A[N + i]
	S += a
	heapq.heappush(f, a)
	a = heapq.heappop(f)
	S -= a
	fs.append(S)
l = [-a for a in A[2 * N:]]
heapq.heapify(l)
S = sum(l)
ls = [S]
for i in range(N):
	a = -A[2 * N - i - 1]
	S += a
	heapq.heappush(l, a)
	a = heapq.heappop(l)
	S -= a
	ls.append(S)
ans = -10 ** 15
for i in range(N + 1):
	ans = max(ans, fs[i] + ls[N - i])
print(ans)


import heapq
n = int(input())
A = list(map(int, input().split()))
L = A[:n]
R = A[2 * n:]
R = list(map(lambda x: -x, R))
sum_l = [sum(L)]
sum_r = [sum(R)]
heapq.heapify(L)
heapq.heapify(R)
for i in range(n):
	elem = A[n + i]
	heapq.heappush(L, elem)
	sum_l.append(sum_l[-1] + elem - heapq.heappop(L))
for i in range(n):
	elem = -A[2 * n - 1 - i]
	heapq.heappush(R, elem)
	sum_r.append(sum_r[-1] + elem - heapq.heappop(R))
ans = -float('inf')
sum_r = sum_r[::-1]
for i in range(len(sum_l)):
	ans = max(ans, sum_l[i] + sum_r[i])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
a1 = a[:n]
heapq.heapify(a1)
a1_sum = sum(a1)
a1_sums = [a1_sum]
for i in range(n, 2 * n):
	a1_min = heapq.heappop(a1)
	if a[i] > a1_min:
		heapq.heappush(a1, a[i])
		a1_sum = a1_sum - a1_min + a[i]
	else:
		heapq.heappush(a1, a1_min)
	a1_sums.append(a1_sum)
a2 = a[-n:]
a2_sum = sum(a2)
a2_sums = [a2_sum]
a2_inv = [-aa for aa in a2]
heapq.heapify(a2_inv)
for i in range(2 * n - 1, n - 1, -1):
	a2_max = -heapq.heappop(a2_inv)
	if a[i] < a2_max:
		heapq.heappush(a2_inv, -a[i])
		a2_sum = a2_sum - a2_max + a[i]
	else:
		heapq.heappush(a2_inv, -a2_max)
	a2_sums.append(a2_sum)
a2_sums = a2_sums[::-1]
ans = a1_sums[0] - a2_sums[0]
for (a1_s, a2_s) in zip(a1_sums, a2_sums):
	ans = max(ans, a1_s - a2_s)
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
(Left, Right) = (A[:N], list(map(lambda a: -a, A[-N:])))
heapq.heapify(Left)
heapq.heapify(Right)
(Left_SUM, Right_SUM) = ([sum(Left)], [-sum(Right)])
M = A[N:2 * N]
for k in range(N):
	lo = heapq.heappushpop(Left, M[k])
	Left_SUM.append(Left_SUM[-1] + M[k] - lo)
for k in reversed(range(N)):
	hi = -heapq.heappushpop(Right, -M[k])
	Right_SUM.append(Right_SUM[-1] + M[k] - hi)
ans = max([l - r for (l, r) in zip(Left_SUM, Right_SUM[::-1])])
print(ans)


import heapq
n = int(input())
A = [int(x) for x in input().split()]
A_rev = [-x for x in A[::-1]]

def get_sum_list(A):
	h = []
	result = []
	current_sum = 0
	for (i, a) in enumerate(A[:2 * n]):
		heapq.heappush(h, a)
		current_sum += a
		if i >= n:
			m = heapq.heappop(h)
			current_sum -= m
		if i >= n - 1:
			result.append(current_sum)
	return result
from_left = get_sum_list(A)
from_right = get_sum_list(A_rev)
ans = -10 ** 18
for i in range(n + 1):
	score = from_left[i] + from_right[n - i]
	if ans < score:
		ans = score
print(ans)


import sys
from heapq import heapify, heappop, heappush
read = sys.stdin.read
(N, *a) = list(map(int, read().split()))
a1 = a[:N]
a2 = a[N:-N]
a3 = a[-N:]
left = sum(a1)
right = sum(a3)
heapify(a1)
a3 = [-i for i in a3]
heapify(a3)
b = [0] * (N + 1)
b[0] = left
for (n, i) in enumerate(a2, 1):
	if a1[0] < i:
		j = heappop(a1)
		left = left - j + i
		heappush(a1, i)
	b[n] = left
c = [0] * (N + 1)
c[0] = right
for (n, i) in enumerate(a2[::-1], 1):
	if i < -a3[0]:
		j = -heappop(a3)
		right = right - j + i
		heappush(a3, -i)
	c[n] = right
c = c[::-1]
answer = max((i - j for (i, j) in zip(b, c)))
print(answer)


import heapq
n = int(input())
a = [int(i) for i in input().split()]
heap_left = []
left = 0
for i in range(n):
	left += a[i]
	heapq.heappush(heap_left, a[i])
lst_left = [left]
for i in range(n, 2 * n):
	tmp = heapq.heappushpop(heap_left, a[i])
	left = left - tmp + a[i]
	lst_left += [left]
heap_right = []
right = 0
for i in range(2 * n, 3 * n):
	right += a[i]
	heapq.heappush(heap_right, -a[i])
lst_right = [right]
for i in range(2 * n - 1, n - 1, -1):
	tmp = heapq.heappushpop(heap_right, -a[i])
	right = right - -tmp + a[i]
	lst_right += [right]
ans = -10 ** 100
for i in range(n + 1):
	ans = max(ans, lst_left[i] - lst_right[-(i + 1)])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
fsum = [0] * (N + 1)
bsum = [0] * (N + 1)
forward = A[:N]
back = A[2 * N:]
back = list(map(lambda x: -x, back))
heapq.heapify(forward)
heapq.heapify(back)
fsum[0] = sum(forward)
fsumnow = fsum[0]
bsum[N] = -sum(back)
bsumnow = bsum[N]
for i in range(1, N + 1):
	heapq.heappush(forward, A[N + i - 1])
	fsumnow += A[N + i - 1]
	fsumnow -= heapq.heappop(forward)
	fsum[i] = fsumnow
	heapq.heappush(back, -A[2 * N - i])
	bsumnow += A[2 * N - i]
	bsumnow += heapq.heappop(back)
	bsum[N - i] = bsumnow
ans = fsum[0] - bsum[0]
for i in range(1, N + 1):
	ans = max(ans, fsum[i] - bsum[i])
print(ans)


import heapq
N = int(input())
a = [int(n) for n in input().split()]
former = a[:N]
heapq.heapify(former)
former_sum = [sum(former)]
for k in range(N):
	heapq.heappush(former, a[N + k])
	former_sum.append(former_sum[k] + a[N + k] - heapq.heappop(former))
a = [n * -1 for n in a]
latter = a[2 * N:]
heapq.heapify(latter)
latter_sum = [sum(latter)]
for k in range(N):
	heapq.heappush(latter, a[2 * N - k - 1])
	latter_sum.append(latter_sum[k] + a[2 * N - k - 1] - heapq.heappop(latter))
res = [former_sum[k] + latter_sum[N - k] for k in range(N + 1)]
print(max(res))


N = int(input())
(*A,) = map(int, input().split())
from heapq import *
B1 = []
hpu = heappush
hpp = heappushpop
for a in A[:N]:
	hpu(B1, a)
S1 = [sum(B1)]
for a in A[N:2 * N]:
	S1.append(S1[-1] + a - hpp(B1, a))
B2 = []
for a in A[2 * N:]:
	hpu(B2, -a)
S2 = [-sum(B2)]
for a in A[N:2 * N][::-1]:
	S2.append(S2[-1] + a + hpp(B2, -a))
print(max((S1[i] - S2[-i - 1] for i in range(N + 1))))


import heapq
N = int(input())
a = list(map(int, input().split()))
S = sum(a[:N])
b = a[:N]
heapq.heapify(b)
dpmax = [S for i in range(N + 1)]
for i in range(N, 2 * N):
	heapq.heappush(b, a[i])
	d = heapq.heappop(b)
	S += a[i] - d
	dpmax[i - N + 1] = S
c = a[-N:]
for i in range(N):
	c[i] = -c[i]
T = sum(c)
heapq.heapify(c)
dpmin = [-T for i in range(N + 1)]
for i in range(N, 2 * N):
	heapq.heappush(c, -a[-1 - i])
	d = heapq.heappop(c)
	T += -a[-1 - i] - d
	dpmin[i + 1 - N] = -T
ans = -1000000000000000000000000000000
for i in range(N + 1):
	ans = max(ans, dpmax[i] - dpmin[N - i])
print(ans)


from heapq import heappush, heappop
N = int(input())
a = [int(x) for x in input().split()]
left = sorted(a[:N])
max_left = [sum(left)]
right = sorted([-x for x in a[-N:]])
min_right = [sum(right) * -1]
for i in range(N, 2 * N):
	j = 3 * N - i - 1
	heappush(left, a[i])
	v = heappop(left)
	max_left.append(max_left[-1] - v + a[i])
	heappush(right, a[j] * -1)
	v = heappop(right) * -1
	min_right.append(min_right[-1] - v + a[j])
ans = float('-inf')
for (l, r) in zip(max_left, min_right[::-1]):
	ans = max(l - r, ans)
print(ans)


def f(x):
	y = x[:n]
	heapify(y)
	z = sum(y)
	yield z
	for i in x[n:n * 2]:
		z += i - heappushpop(y, i)
		yield z
from heapq import *
(n, *a) = map(int, open(0).read().split())
print(max(map(sum, zip(f([-i for i in a[n:][::-1]]), list(f(a))[::-1]))))


import heapq
n = int(input())
num = [int(v) for v in input().split()]
left_list = num[:n]
right_list = [-i for i in num[2 * n:]]
left_list.sort()
right_list.sort()
(sl, sr) = (sum(left_list), sum(right_list))
sum_left_list = [sl]
sum_right_list = [sr]
for p in num[n:2 * n]:
	q = heapq.heappop(left_list)
	if p > q:
		sl += p - q
		heapq.heappush(left_list, p)
	else:
		heapq.heappush(left_list, q)
	sum_left_list.append(sl)
for p in num[2 * n - 1:n - 1:-1]:
	p *= -1
	q = heapq.heappop(right_list)
	if p > q:
		sr += p - q
		heapq.heappush(right_list, p)
	else:
		heapq.heappush(right_list, q)
	sum_right_list.append(sr)
sum_right_list.reverse()
ans_list = [sum_left_list[i] + sum_right_list[i] for i in range(n + 1)]
print(max(ans_list))


n = int(input())
a = list(map(int, input().split()))
b = list(enumerate(a))
l = sorted(b[:2 * n], key=lambda x: x[1], reverse=True)
r = sorted(b[n:], key=lambda x: x[1])
big = [0] * (3 * n)
small = [0] * (3 * n)
for (i, (pos, z)) in enumerate(l):
	big[pos] = i
for (i, (pos, z)) in enumerate(r):
	small[pos] = i
first = sum(a[:n])
second = 0
for (pos, z) in r[:n]:
	second += z
i = 2 * n
j = n - 1
ans = first - second
for split in range(n, 2 * n):
	if big[split] < i:
		first += a[split]
		i -= 1
		while l[i][0] > split:
			i -= 1
		first -= l[i][1]
	if small[split] <= j:
		second -= a[split]
		j += 1
		while r[j][0] < split:
			j += 1
		second += r[j][1]
	ans = max(ans, first - second)
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
R = A[:N]
B = [-a for a in A[2 * N:]]
heapq.heapify(R)
heapq.heapify(B)
R_sum = [sum(R)]
B_sum = [sum(B)]
for i in range(N, 2 * N):
	heapq.heappush(R, A[i])
	q = heapq.heappop(R)
	R_sum.append(max(R_sum[-1], R_sum[-1] + A[i] - q))
for i in range(2 * N - 1, N - 1, -1):
	heapq.heappush(B, -A[i])
	q = heapq.heappop(B)
	B_sum.append(max(B_sum[-1], B_sum[-1] - A[i] - q))
num = -float('inf')
for (p, q) in zip(R_sum, B_sum[::-1]):
	num = max(num, p + q)
print(num)


import heapq
N = int(input())
A = list(map(int, input().split()))
R = sorted(A[:N])
SUM1 = [sum(A[:N])]
for i in range(N, 2 * N):
	heapq.heappush(R, A[i])
	tmp = heapq.heappop(R)
	SUM1.append(SUM1[-1] + A[i] - tmp)
B = list(map(lambda x: x * -1, A[2 * N:3 * N]))
B.sort()
SUM2 = [-sum(B)]
for i in range(2 * N - 1, N - 1, -1):
	heapq.heappush(B, -A[i])
	tmp = heapq.heappop(B)
	SUM2.append(SUM2[-1] + A[i] + tmp)
ans = -float('inf')
for i in range(N + 1):
	ans = max(ans, SUM1[i] - SUM2[-(i + 1)])
print(ans)


import sys
from heapq import *
(n, *a) = map(int, sys.stdin.read().split())

def optimize(arr):
	res = arr[:n]
	heapify(res)
	sum_arr = [sum(res)]
	for x in arr[n:]:
		y = heappop(res)
		heappush(res, max(x, y))
		sum_arr.append(sum_arr[-1] + max(0, x - y))
	return sum_arr

def main():
	left = a[:n * 2]
	right = [-x for x in a[n:]][::-1]
	sum_left = optimize(left)
	sum_right = optimize(right)
	res = []
	for i in range(n + 1):
		res.append(sum_left[i] + sum_right[n - i])
	ans = max(res)
	return ans
ans = main()
print(ans)


import heapq
N = int(input())
a = list(map(int, input().split()))
push = heapq.heappush
pop = heapq.heappop
lq = []
l = [0] * (N + 1)
for i in range(N):
	push(lq, a[i])
	l[0] += a[i]
for i in range(N):
	l[i + 1] = l[i]
	x = pop(lq)
	if a[N + i] > x:
		l[i + 1] += a[N + i] - x
		push(lq, a[N + i])
	else:
		push(lq, x)
rq = []
r = [0] * (N + 1)
for i in range(N):
	push(rq, -a[-1 - i])
	r[-1] += a[-1 - i]
for i in range(N):
	r[-2 - i] = r[-1 - i]
	x = pop(rq)
	if a[-N - 1 - i] < -x:
		r[-2 - i] -= -x - a[-N - 1 - i]
		push(rq, -a[-N - 1 - i])
	else:
		push(rq, x)
ans = l[0] - r[0]
for i in range(1, N + 1):
	ans = max(ans, l[i] - r[i])
print(ans)


N = int(input())
A = list(map(int, input().split()))
import heapq
L = A[:N]
heapq.heapify(L)
sum_L = sum(A[:N])
L_list = []
L_list.append(sum_L)
for i in range(N):
	sum_L += A[N + i]
	heapq.heappush(L, A[N + i])
	sum_L -= heapq.heappop(L)
	L_list.append(sum_L)
A = list(map(lambda x: -x, A[::-1]))
R = A[:N]
heapq.heapify(R)
sum_R = sum(A[:N])
R_list = []
R_list.append(sum_R)
for i in range(N):
	sum_R += A[N + i]
	heapq.heappush(R, A[N + i])
	sum_R -= heapq.heappop(R)
	R_list.append(sum_R)
maxi = -10000000000000000000000000000
R_list = R_list[::-1]
for i in range(N + 1):
	maxi = max(maxi, L_list[i] + R_list[i])
print(maxi)


import heapq as hp
import sys
input = sys.stdin.readline
N = int(input())
A = list(map(int, input().split()))
q1 = []
for i in range(N):
	hp.heappush(q1, A[i])
Psum = [0] * (N + 1)
Psum[0] = sum(q1)
for i in range(N):
	a1 = hp.heappop(q1)
	p = max(a1, A[N + i])
	hp.heappush(q1, p)
	Psum[i + 1] = Psum[i] + p - a1
q2 = []
for i in range(N):
	hp.heappush(q2, -A[i + 2 * N])
Qsum = [0] * (N + 1)
Qsum[N] = sum(q2)
for i in range(N - 1, -1, -1):
	a2 = hp.heappop(q2)
	p = max(a2, -A[N + i])
	hp.heappush(q2, p)
	Qsum[i] = Qsum[i + 1] + p - a2
for i in range(N + 1):
	if i == 0:
		ans = Psum[i] + Qsum[i]
	ans = max(Psum[i] + Qsum[i], ans)
print(ans)


import heapq
N = int(input())
A = [int(i) for i in input().split()]
sumLeft = [0] * (N + 1)
sumLeft[0] = sum(A[:N])
Aleft = A[:N]
heapq.heapify(Aleft)
sumRight = [0] * (N + 1)
sumRight[-1] = sum(A[2 * N:])
Aright = [-1 * i for i in A[2 * N:]]
heapq.heapify(Aright)
for i in range(1, N + 1):
	a = A[N + i - 1]
	b = -1 * A[2 * N - i]
	sumLeft[i] = sumLeft[i - 1] + a - heapq.heappushpop(Aleft, a)
	sumRight[-1 - i] = sumRight[-i] + heapq.heappushpop(Aright, b) - b
score = sumLeft[0] - sumRight[0]
for i in range(1, N + 1):
	score = max(score, sumLeft[i] - sumRight[i])
print(score)


import heapq
n = int(input())
A = list(map(int, input().split()))
A_l = A[:n]
heapq.heapify(A_l)
A_l_sum = [sum(A_l)]
A_m = A[n:2 * n]
for i in range(n):
	p = A_m[i]
	heapq.heappush(A_l, p)
	q = heapq.heappop(A_l)
	A_l_sum.append(A_l_sum[-1] + p - q)
A_r = A[2 * n:3 * n]
for i in range(n):
	A_r[i] *= -1
for i in range(n):
	A_m[i] *= -1
A_m = A_m[::-1]
heapq.heapify(A_r)
A_r_sum = [sum(A_r)]
for i in range(n):
	p = A_m[i]
	heapq.heappush(A_r, p)
	q = heapq.heappop(A_r)
	A_r_sum.append(A_r_sum[-1] + p - q)
ans = -float('INF')
for i in range(n + 1):
	ans = max(ans, A_l_sum[i] + A_r_sum[-i - 1])
print(ans)


N = int(input())
array = [int(n) for n in input().split()]
import copy
import heapq
lst = [None for i in range(N + 1)]
left_lst = copy.deepcopy(lst)
right_lst = copy.deepcopy(lst)
left_array = array[:N]
right_array = [-n for n in array[-N:]]
l_sum = sum(left_array)
r_sum = sum(right_array)
heapq.heapify(left_array)
heapq.heapify(right_array)
left_lst[0] = l_sum
right_lst[0] = r_sum
for k in range(N, 2 * N):
	(new_a, new_b) = (array[k], array[-k - 1] * -1)
	heapq.heappush(left_array, new_a)
	heapq.heappush(right_array, new_b)
	old_a = heapq.heappop(left_array)
	l_sum += new_a - old_a
	left_lst[k - N + 1] = l_sum
	old_b = heapq.heappop(right_array)
	r_sum += new_b - old_b
	right_lst[k - N + 1] = r_sum
lst = [a + b for (a, b) in zip(left_lst, list(reversed(right_lst)))]
print(max(lst))


import copy
import heapq
from collections import deque
n = int(input())
left = []
middle = deque([])
right = []
A = list(map(int, input().split()))
for i in range(n):
	heapq.heappush(left, A[i])
c = sum(left)
for i in range(n):
	middle.append(A[n + i])
for i in range(n):
	heapq.heappush(right, A[2 * n + i] * -1)
d = sum(right)
l = deque([0])
m = copy.copy(middle)
for i in range(n):
	a = left[0]
	b = m[0]
	l.append(l[-1] + max(0, b - a))
	if b - a > 0:
		heapq.heapreplace(left, b)
	m.popleft()
m = copy.copy(middle)
r = deque([0])
for i in range(n):
	a = right[0] * -1
	b = m[-1]
	r.append(r[-1] + max(0, a - b))
	if a - b > 0:
		heapq.heapreplace(right, b * -1)
	m.pop()
ans = 0
for i in range(n + 1):
	a = l[0] + r[-1]
	if a > ans:
		ans = a
	l.popleft()
	r.pop()
print(c + d + ans)


import sys
sys.setrecursionlimit(2147483647)
INF = float('inf')
MOD = 10 ** 9 + 7
input = lambda : sys.stdin.readline().rstrip()
from heapq import heapify, heappop, heappush

def resolve():
	n = int(input())
	A = list(map(int, input().split()))
	P = [None] * (n + 1)
	S = [None] * (n + 1)
	Q = A[:n]
	P[0] = sum(Q)
	heapify(Q)
	for i in range(1, n + 1):
		a = heappop(Q)
		b = A[n + i - 1]
		P[i] = P[i - 1] - a + max(a, b)
		heappush(Q, max(a, b))
	Q = [-a for a in A[2 * n:]]
	S[-1] = sum(Q)
	heapify(Q)
	for i in range(n - 1, -1, -1):
		a = heappop(Q)
		b = -A[n + i]
		S[i] = S[i + 1] - a + max(a, b)
		heappush(Q, max(a, b))
	print(max(*(p + s for (p, s) in zip(P, S))))
resolve()


import sys, math, heapq, copy
input = lambda : sys.stdin.buffer.readline().rstrip().decode('utf-8')
sys.setrecursionlimit(10 ** 8)
inf = float('inf')
ans = count = 0
ans = -inf
n = int(input())
A = list(map(int, input().split()))
(AL, AR) = (A[:n], A[2 * n:])
(al, ar) = (copy.copy(AL), copy.copy(AR))
AN = A[n:2 * n]
(LS, RS) = (sum(AL), sum(AR))
AR = list(map(lambda ddd: -ddd, AR))
heapq.heapify(AL)
heapq.heapify(AR)
tmp = LS
ANSR = [0] * n
ANSL = [0] * n
for i in range(n):
	if AN[i] - AL[0] > 0:
		LS = LS - heapq.heappop(AL) + AN[i]
		heapq.heappush(AL, AN[i])
	ANSL[i] = LS
LS = tmp
for j in range(n - 1, -1, -1):
	if 0 < -AR[0] - AN[j]:
		RS = RS + heapq.heappop(AR) + AN[j]
		heapq.heappush(AR, -AN[j])
	ANSR[j] = RS
ANSR = ANSR + [sum(ar)]
ANSL = [sum(al)] + ANSL
for i in range(n + 1):
	ans = max(ans, ANSL[i] - ANSR[i])
print(ans)


from heapq import heappush, heappop
n = int(input())
a = list(map(int, input().split()))
l = []
for v in a[:n]:
	heappush(l, v)
suml = [sum(a[:n])]
for i in range(n):
	suml.append(suml[i] + a[n + i])
	heappush(l, a[n + i])
	suml[i + 1] -= heappop(l)
r = []
for v in a[2 * n:]:
	heappush(r, (10 ** 10 - v, v))
sumr = [sum(a[2 * n:])]
for i in range(n):
	sumr.append(sumr[i] + a[2 * n - i - 1])
	heappush(r, (10 ** 10 - a[2 * n - i - 1], a[2 * n - i - 1]))
	(_, t) = heappop(r)
	sumr[i + 1] -= t
ans = -10 ** 20
for i in range(n + 1):
	ans = max(ans, suml[i] - sumr[n - i])
print(ans)


n = int(input())
a = list(map(int, input().split()))
b = a[n:2 * n]
import heapq
q = a[:n]
heapq.heapify(q)
res = [0] * (n + 1)
res[0] = sum(q)
for (i, x) in enumerate(b):
	heapq.heappush(q, x)
	y = heapq.heappop(q)
	res[i + 1] = res[i] + x - y
b.reverse()
q = [-x for x in a[2 * n:]]
heapq.heapify(q)
s = -sum(q)
res[-1] -= s
for (i, x) in enumerate(b):
	heapq.heappush(q, -x)
	y = heapq.heappop(q)
	s += x + y
	res[-2 - i] -= s
print(max(res))


from heapq import heappop, heappush
N = int(input())
(*a,) = map(int, input().split())
r = [None] * (3 * N)
s = [None] * (3 * N)
p = []
q = []
ans = -float('inf')
for i in range(N):
	heappush(p, a[i])
v = sum(p)
r[N - 1] = v
for i in range(N, 2 * N):
	heappush(p, a[i])
	b = heappop(p)
	v = v + a[i] - b
	r[i] = v
for i in range(2 * N, 3 * N)[::-1]:
	heappush(q, -a[i])
v = sum(q)
s[2 * N] = -v
for i in range(N, 2 * N)[::-1]:
	heappush(q, -a[i])
	b = heappop(q)
	v = v - a[i] - b
	s[i] = -v
for i in range(N - 1, 2 * N):
	ans = max(ans, r[i] - s[i + 1])
print(ans)


n = int(input())
import heapq
a = list(map(int, input().split()))
q = a[:n]
heapq.heapify(q)
x = [sum(q)]
for k in range(n, 2 * n):
	v = heapq.heappushpop(q, a[k])
	x.append(x[-1] + a[k] - v)
a = a[::-1]
q = [-v for v in a[:n]]
heapq.heapify(q)
y = [-sum(q)]
for k in range(n, 2 * n):
	v = -heapq.heappushpop(q, -a[k])
	y.append(y[-1] + a[k] - v)
print(max((v - w for (v, w) in zip(x, y[::-1]))))


import heapq
import copy
n = int(input())
a = list(map(int, input().split()))
ca = copy.deepcopy(a)
f = ca[:n]
heapq.heapify(f)
fs = sum(f)
fsl = [0 for i in range(n + 1)]
fsl[0] = fs
for i in range(n, 2 * n):
	heapq.heappush(f, a[i])
	fs = fs + a[i] - heapq.heappop(f)
	fsl[i - n + 1] = fs
l = list(map(lambda x: -x, ca[2 * n:]))
heapq.heapify(l)
ls = sum(l)
lsl = [0 for i in range(n + 1)]
lsl[-1] = ls
for i in range(n, 2 * n):
	heapq.heappush(l, -a[3 * n - i - 1])
	ls = ls - a[3 * n - i - 1] - heapq.heappop(l)
	lsl[2 * n - i - 1] = ls
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, fsl[i] + lsl[i])
print(ans)


import heapq
N = int(input())
a = list(map(int, input().split()))
earl = []
late = []
for i in range(N):
	heapq.heappush(earl, a[i])
	heapq.heappush(late, -a[2 * N + i])
E = 0
L = 0
for i in range(N):
	E += a[i]
	L -= a[2 * N + i]
e = [E] * (N + 1)
l = [L] * (N + 1)
for i in range(N):
	e[i + 1] = e[i] + a[N + i] - heapq.heappushpop(earl, a[N + i])
	l[N - 1 - i] = l[N - i] - a[2 * N - 1 - i] - heapq.heappushpop(late, -a[2 * N - 1 - i])
ans = e[N] + l[N]
for i in range(N):
	ans = max(ans, e[i] + l[i])
print(ans)


import heapq

def main():
	N = int(input())
	a = list(map(int, input().split()))
	left = [0] * (3 * N)
	right = [0] * (3 * N)
	tmp = 0
	q = []
	for i in range(N):
		heapq.heappush(q, a[i])
		tmp += a[i]
	left[N - 1] = tmp
	for i in range(N, 2 * N):
		heapq.heappush(q, a[i])
		left[i] = left[i - 1] + a[i] - heapq.heappop(q)
	tmp = 0
	q = []
	for i in range(N * 3 - 1, N * 2 - 1, -1):
		heapq.heappush(q, -a[i])
		tmp += a[i]
	right[2 * N] = tmp
	for i in range(2 * N - 1, N - 1, -1):
		heapq.heappush(q, -a[i])
		right[i] = right[i + 1] + a[i] + heapq.heappop(q)
	ans = left[N - 1] - right[N]
	for i in range(N, 2 * N):
		ans = max(ans, left[i] - right[i + 1])
	print(ans)

def __starting_point():
	main()
__starting_point()


import heapq
n = int(input())
a = list(map(int, input().split()))
p = [0] * (n + 1)
q = [] + p
L = []
R = []
C = [] + a[n:n * 2]
for i in range(n):
	heapq.heappush(L, a[i])
	heapq.heappush(R, -a[n * 2 + i])
p[0] = sum(L)
q[n] = sum(R)
for i in range(n):
	if C[i] > L[0]:
		p[i + 1] = p[i] + C[i] - L[0]
		heapq.heappop(L)
		heapq.heappush(L, C[i])
	else:
		p[i + 1] = p[i]
	temp = C[n - 1 - i] * -1
	if temp > R[0]:
		q[n - 1 - i] = q[n - i] + temp - R[0]
		heapq.heappop(R)
		heapq.heappush(R, temp)
	else:
		q[n - 1 - i] = q[n - i]
ans = p[n] + q[n]
for i in range(n):
	ans = max(ans, p[i] + q[i])
print(ans)


from heapq import heappop, heappush, heapify
n = int(input())
al = list(map(int, input().split()))
ll = al[0:n]
cl = al[n:2 * n]
rl = al[2 * n:3 * n]
rl = list(map(lambda x: -x, rl))
heapify(ll)
heapify(rl)
ll_vals = []
ll_vals.append(sum(ll))
c_sum = sum(ll)
c_max = c_sum
for i in range(n):
	poped = heappop(ll)
	c_sum -= poped
	heappush(ll, cl[i])
	c_sum += cl[i]
	c_max = max(c_max, c_sum)
	ll_vals.append(c_max)
rl_vals = []
rl_vals.append(-sum(rl))
c_sum = -sum(rl)
c_min = c_sum
for i in range(n):
	poped = -heappop(rl)
	c_sum -= poped
	heappush(rl, -cl[n - 1 - i])
	c_sum += cl[n - 1 - i]
	c_min = min(c_min, c_sum)
	rl_vals.append(c_min)
ans = -1 * 10 ** 18
for i in range(n + 1):
	v = ll_vals[i] - rl_vals[n - i]
	ans = max(ans, v)
print(ans)


from heapq import heappop, heappush, heapify

def main():
	n = int(input())
	A = list(map(int, input().split()))
	left_sums = []
	left = A[:n]
	left_sum = sum(left)
	left_sums.append(left_sum)
	heapify(left)
	for a in A[n:2 * n]:
		left_sum += a
		heappush(left, a)
		left_sum -= heappop(left)
		left_sums.append(left_sum)
	right_sums = []
	right = []
	for a in A[2 * n:]:
		right.append(-a)
	right_sum = sum(right)
	right_sums.append(-right_sum)
	heapify(right)
	for a in A[2 * n - 1:n - 1:-1]:
		right_sum += -a
		heappush(right, -a)
		right_sum -= heappop(right)
		right_sums.append(-right_sum)
	candidates = []
	for (sum1, sum2) in zip(left_sums, right_sums[::-1]):
		candidates.append(sum1 - sum2)
	print(max(candidates))

def __starting_point():
	main()
__starting_point()


import heapq
N = int(input())
A = list(map(int, input().split()))
left = [sum(A[:N])]
h1 = A[:N]
heapq.heapify(h1)
for i in range(N):
	heapq.heappush(h1, A[N + i])
	temp = heapq.heappop(h1)
	left.append(left[-1] + A[N + i] - temp)
right = [sum(A[2 * N:])]
h2 = list(map(lambda x: -x, A[2 * N:]))
heapq.heapify(h2)
for i in range(N):
	heapq.heappush(h2, -A[2 * N - 1 - i])
	temp = -1 * heapq.heappop(h2)
	right.append(right[-1] + A[2 * N - 1 - i] - temp)
ans = float('-inf')
for i in range(N + 1):
	ans = max(ans, left[i] - right[-(i + 1)])
print(ans)


import sys
from heapq import heappush, heappop, heapify
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 18
MOD = 10 ** 9 + 7
input = lambda : sys.stdin.readline().rstrip()
YesNo = lambda b: bool([print('Yes')] if b else print('No'))
YESNO = lambda b: bool([print('YES')] if b else print('NO'))
int1 = lambda x: int(x) - 1

def main():
	N = int(input())
	a = list(map(int, input().split()))
	f = [0] * (N + 1)
	s = [0] * (N + 1)
	h = a[:N]
	heapify(h)
	f[0] = sum(a[:N])
	for i in range(N):
		heappush(h, a[N + i])
		f[i + 1] = f[i] + a[N + i] - heappop(h)
	h = [-x for x in a[2 * N:]]
	heapify(h)
	s[N] = sum(a[2 * N:])
	for i in range(N):
		heappush(h, -a[2 * N - i - 1])
		s[N - i - 1] = s[N - i] + a[2 * N - i - 1] + heappop(h)
	ans = -INF
	for (x, y) in zip(f, s):
		ans = max(ans, x - y)
	print(ans)
main()


import heapq
N = int(input())
A = list(map(int, input().split()))
B = A[:N]
S = sum(B)
heapq.heapify(B)
BS = [0] * (3 * N)
BS[N] = S
for i in range(N, 2 * N):
	if B[0] < A[i]:
		x = heapq.heappop(B)
		S += A[i] - x
		heapq.heappush(B, A[i])
	BS[i + 1] = S
C = [-c for c in A[2 * N:]]
S = -sum(C)
heapq.heapify(C)
CS = [0] * (3 * N)
CS[2 * N] = S
for i in range(2 * N - 1, N - 1, -1):
	if -C[0] > A[i]:
		x = -heapq.heappop(C)
		S += A[i] - x
		heapq.heappush(C, -A[i])
	CS[i] = S
ANS = -float('inf')
for i in range(N, 2 * N + 1):
	ANS = max(ANS, BS[i] - CS[i])
print(ANS)


n = int(input())
a = list(map(int, input().split()))
left = [0] * (2 * n + 1)
right = [0] * (2 * n + 1)
now_a = a[:n]
left[n] = sum(now_a)
now_a.sort()
from heapq import heapify, heappop, heappush
heapify(now_a)
for i in range(n, 2 * n):
	if a[i] > now_a[0]:
		left[i + 1] = left[i] + a[i] - now_a[0]
		heappop(now_a)
		heappush(now_a, a[i])
	else:
		left[i + 1] = left[i]
b = [-x for x in a]
now_b = b[-n:]
right[n] = sum(now_b)
now_b.sort()
heapify(now_b)
for i in range(n, 2 * n):
	if b[-i - 1] > now_b[0]:
		right[i + 1] = right[i] + b[-i - 1] - now_b[0]
		heappop(now_b)
		heappush(now_b, b[-i - 1])
	else:
		right[i + 1] = right[i]
ans = -pow(10, 14)
for i in range(n + 1):
	ans = max(ans, left[n + i] + right[2 * n - i])
print(ans)


import heapq
n = int(input().strip())
a = list(map(int, input().split()))
pre = a[:n]
heapq.heapify(pre)
suf = list(map(lambda x: -x, a[2 * n:]))
heapq.heapify(suf)
left = {}
right = {}
pre_sum = sum(pre)
suf_sum = -sum(suf)
left[n - 1] = pre_sum
right[2 * n] = suf_sum
for i in range(n, 2 * n):
	heapq.heappush(pre, a[i])
	pre_sum = pre_sum + a[i] - heapq.heappop(pre)
	left[i] = pre_sum
for i in range(2 * n - 1, n - 1, -1):
	heapq.heappush(suf, -a[i])
	suf_sum = suf_sum + a[i] + heapq.heappop(suf)
	right[i] = suf_sum
ans = -float('inf')
for i in range(n - 1, 2 * n):
	ans = max(ans, left[i] - right[i + 1])
print(ans)


import heapq
N = int(input())
A = [int(a) for a in input().split()]
L = A[:2 * N]
L.sort()
s1 = 0
s2 = 0
h1 = []
h2 = []
dic = {}
dic_h = {}
for i in range(N):
	heapq.heappush(h1, -L[i])
	if L[i] in dic_h:
		dic_h[L[i]] += 1
	else:
		dic_h[L[i]] = 1
	s1 += L[i + N]
	if L[i + N] in dic:
		dic[L[i + N]] += 1
	else:
		dic[L[i + N]] = 1
	s2 += A[i + 2 * N]
	heapq.heappush(h2, -A[i + 2 * N])
ans = s1 - s2
for i in range(2 * N - 1, N - 1, -1):
	if A[i] + h2[0] < 0:
		s2 += heapq.heappop(h2)
		heapq.heappush(h2, -A[i])
		s2 += A[i]
	if A[i] in dic:
		if dic[A[i]] > 0:
			dic[A[i]] -= 1
			s1 -= A[i]
			t = -heapq.heappop(h1)
			while h1:
				if dic_h[t] > 0:
					dic_h[t] -= 1
					break
				else:
					t = -heapq.heappop(h1)
			s1 += t
			if t in dic:
				dic[t] += 1
			else:
				dic[t] = 1
	else:
		dic_h[A[i]] -= 1
	ans = max(ans, s1 - s2)
print(ans)


import copy
import heapq
N = int(input())
A = list(map(int, input().split()))
h1 = copy.deepcopy(A[:N])
x = sorted(A[N:])
h2 = x[N:]
x = x[:N]
now_w = sum(h1) - sum(x)
ans = now_w
used = []
heapq.heapify(h1)
heapq.heapify(h2)
heapq.heapify(used)
for i in range(N):
	now = A[N + i]
	heapq.heappush(h1, now)
	left = heapq.heappop(h1)
	while True:
		right_cand = heapq.heappop(h2)
		if len(used) > 0:
			x = heapq.heappop(used)
			if x == right_cand:
				continue
			else:
				heapq.heappush(used, x)
		break
	if right_cand >= now:
		right = right_cand
	else:
		right = now
		heapq.heappush(h2, right_cand)
		heapq.heappush(used, now)
	now_w = now_w - left + 2 * now - right
	ans = max(ans, now_w)
print(ans)


import heapq
import bisect
n = int(input())
a = list(map(int, input().split()))
first_que = [a[i] for i in range(n)]
first_sum = sum(first_que)
heapq.heapify(first_que)
latter_que = [a[i] * -1 for i in range(2 * n, 3 * n)]
latter_sum = sum(latter_que) * -1
heapq.heapify(latter_que)
ans = [0 for i in range(n + 1)]
ans[0] = first_sum
for i in range(n, 2 * n):
	heapq.heappush(first_que, a[i])
	p = heapq.heappop(first_que)
	first_sum += a[i] - p
	ans[i - n + 1] = first_sum
ans[-1] -= latter_sum
for i in range(2 * n - 1, n - 1, -1):
	heapq.heappush(latter_que, a[i] * -1)
	p = heapq.heappop(latter_que) * -1
	latter_sum += a[i] - p
	ans[i - n] -= latter_sum
print(max(ans))


with open(0) as f:
	(N, *a) = map(int, f.read().split())
F = [x for x in a[:N]]
C = [x for x in a[N:2 * N]]
B = [-x for x in a[2 * N:]]
import heapq as hq
hq.heapify(F)
hq.heapify(B)
from copy import deepcopy
memoF = [0] * (N + 1)
memoF[0] = sum(F)
memoB = [0] * (N + 1)
memoB[N] = sum(B)
for i in range(N):
	if C[i] > F[0]:
		memoF[i + 1] = memoF[i] + C[i] - hq.heapreplace(F, C[i])
	else:
		memoF[i + 1] = memoF[i]
	if -C[N - 1 - i] > B[0]:
		memoB[N - 1 - i] = memoB[N - i] - C[N - 1 - i] - hq.heapreplace(B, -C[N - 1 - i])
	else:
		memoB[N - 1 - i] = memoB[N - i]
Scores = [memoF[i] + memoB[i] for i in range(N + 1)]
ans = max(Scores)
print(ans)


from heapq import heappush, heappop
N = int(input())
A = [int(a) for a in input().split()]
dpx = [0] * (N + 1)
dpy = [0] * (N + 1)
dpx[0] = sum(A[:N])
dpy[-1] = sum(A[2 * N:])
X = []
Y = []
for i in range(N):
	heappush(X, A[i])
for i in range(N):
	heappush(Y, -A[3 * N - 1 - i])
for i in range(N):
	a = heappop(X)
	b = A[N + i]
	if b > a:
		heappush(X, b)
		dpx[i + 1] = dpx[i] + b - a
	else:
		heappush(X, a)
		dpx[i + 1] = dpx[i]
	c = -heappop(Y)
	d = A[2 * N - 1 - i]
	if d < c:
		heappush(Y, -d)
		dpy[N - 1 - i] = dpy[N - i] + d - c
	else:
		heappush(Y, -c)
		dpy[N - 1 - i] = dpy[N - i]
ans = -float('inf')
for i in range(N + 1):
	ans = max(ans, dpx[i] - dpy[i])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
(left, right) = (A[:N], A[-N:])
right = list(map(lambda x: -x, right))
(left_sum, right_sum) = ([sum(left)], [-sum(right)])
heapq.heapify(left)
heapq.heapify(right)
for i in range(N, 2 * N):
	heapq.heappush(left, A[i])
	low = heapq.heappop(left)
	left_sum.append(left_sum[-1] + A[i] - low)
for i in range(2 * N - 1, N - 1, -1):
	heapq.heappush(right, -A[i])
	high = -heapq.heappop(right)
	right_sum.append(right_sum[-1] + A[i] - high)
right_sum = right_sum[::-1]
ans = max([l - r for (l, r) in zip(left_sum, right_sum)])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
pre = sum(a[:n])
post = -sum(a[2 * n:])
post2 = post
ans = -pre + post
Q = []
for i in range(n):
	heapq.heappush(Q, a[i])
S_pre = [pre]
for i in range(n, 2 * n):
	pre += a[i]
	heapq.heappush(Q, a[i])
	q = heapq.heappop(Q)
	pre -= q
	S_pre.append(pre)
Q2 = []
for i in range(2 * n, 3 * n):
	heapq.heappush(Q2, -a[i])
S_post = [post]
for i in range(2 * n - 1, n - 1, -1):
	post -= a[i]
	heapq.heappush(Q2, -a[i])
	q = heapq.heappop(Q2)
	post -= q
	S_post.append(post)
for i in range(n + 1):
	ans = max(ans, S_pre[n - i] + S_post[i])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
plus = [sum(a[:n])]
minus = [-sum(a[-n:])]
p = a[:n]
m = [-i for i in a[-n:]]
heapq.heapify(p)
heapq.heapify(m)
for i in range(n, 2 * n):
	pn = a[i]
	mn = -a[-(i + 1)]
	if pn > p[0]:
		plus.append(plus[-1] + pn - heapq.heappop(p))
		heapq.heappush(p, pn)
	else:
		plus.append(plus[-1])
	if mn > m[0]:
		minus.append(minus[-1] + mn - heapq.heappop(m))
		heapq.heappush(m, mn)
	else:
		minus.append(minus[-1])
minus.reverse()
ans = []
for (i, j) in zip(plus, minus):
	ans.append(i + j)
print(max(ans))


import heapq
n = int(input())
l = list(map(int, input().split()))
q = []
for i in range(n):
	heapq.heappush(q, l[i])
a1 = [0] * (n + 1)
a1[0] = sum(l[:n])
for i in range(n):
	p = heapq.heappop(q)
	a1[i + 1] = a1[i] - p + max(p, l[i + n])
	heapq.heappush(q, max(p, l[i + n]))
q = []
l.reverse()
for i in range(n):
	heapq.heappush(q, -l[i])
a1.reverse()
a1[0] -= sum(l[:n])
z = sum(l[:n])
for i in range(n):
	p = heapq.heappop(q)
	z = z + p + min(-p, l[i + n])
	a1[i + 1] -= z
	heapq.heappush(q, max(p, -l[i + n]))
print(max(a1))


def d_3n_numbers(N, A):
	import heapq
	left = A[:N]
	heapq.heapify(left)
	right = [-i for i in A[2 * N:]]
	heapq.heapify(right)
	left_sum = [sum(left)]
	right_sum = [-sum(right)]
	for k in range(N, 2 * N):
		heapq.heappush(left, A[k])
		v = heapq.heappop(left)
		left_sum.append(left_sum[-1] + A[k] - v)
	for k in range(2 * N - 1, N - 1, -1):
		heapq.heappush(right, -A[k])
		v = heapq.heappop(right)
		right_sum.append(right_sum[-1] + A[k] - -v)
	score = [a - b for (a, b) in zip(left_sum, right_sum[::-1])]
	return max(score)
N = int(input())
A = [int(i) for i in input().split()]
print(d_3n_numbers(N, A))


import heapq

def solve():
	n = int(input())
	a = list((int(i) for i in input().split()))
	an = []
	a2n = a[n:2 * n]
	a3n = []
	for i in range(n):
		heapq.heappush(an, a[i])
		heapq.heappush(a3n, -1 * a[i + 2 * n])
	ta2n = a2n
	tmpsuman = sum(an)
	tmpsuma3n = -1 * sum(a3n)
	suman = [tmpsuman]
	suma3n = [tmpsuma3n]
	for i in range(n):
		tmp = ta2n[i]
		tmpsuman += tmp
		heapq.heappush(an, tmp)
		tmpsuman -= heapq.heappop(an)
		suman.append(tmpsuman)
	for i in range(n):
		tmp = ta2n[n - i - 1]
		tmpsuma3n += tmp
		heapq.heappush(a3n, -1 * tmp)
		tmpsuma3n -= -1 * heapq.heappop(a3n)
		suma3n.append(tmpsuma3n)
	ans = -10000000000000000
	for i in range(n + 1):
		tmpans = suman[i] - suma3n[n - i]
		ans = max(ans, tmpans)
	print(ans)
solve()


from heapq import heapify, heappop, heappush
N = int(input())
A = list(map(int, input().split()))
A = [-a for a in A]
L = [[a, i] for (i, a) in enumerate(A[:2 * N])]
Sl = 0
heapify(L)
used = set()
for i in range(N):
	(a, i) = heappop(L)
	used.add(i)
	Sl -= a
R = A[2 * N:].copy()
Sr = -sum(R)
heapify(R)
ans = Sl - Sr
for i in range(2 * N - 1, N - 1, -1):
	a = -A[i]
	r = -heappop(R)
	if a > r:
		heappush(R, -r)
	else:
		Sr += a - r
		heappush(R, -a)
	if i in used:
		while L:
			(l, j) = heappop(L)
			l *= -1
			if j < i:
				Sl += l - a
				used.add(j)
				break
	ans = max(ans, Sl - Sr)
print(ans)


N = int(input())
A = list(map(int, input().split()))
import heapq
X = A[:N]
Y = [-i for i in A[2 * N:]]
heapq.heapify(X)
heapq.heapify(Y)
x = sum(X)
y = -sum(Y)
XMA = [0] * (N + 1)
YMI = [0] * (N + 1)
XMA[0] = x
YMI[N] = y
for i in range(N):
	heapq.heappush(X, A[N + i])
	s = heapq.heappop(X)
	x += A[N + i] - s
	XMA[i + 1] = x
	heapq.heappush(Y, -A[2 * N - 1 - i])
	t = -heapq.heappop(Y)
	y += A[2 * N - 1 - i] - t
	YMI[N - i - 1] = y
ANS = [0] * (N + 1)
for i in range(N + 1):
	ANS[i] = XMA[i] - YMI[i]
print(max(ANS))


import heapq
n = int(input())
a = list(map(int, input().split()))
red = a[:n]
sr = sum(red)
sum_red = {n: sr}
heapq.heapify(red)
blue = [-1 * i for i in a[2 * n:]]
sb = sum(blue)
sum_blue = {2 * n: sb}
heapq.heapify(blue)
for k in range(n, 2 * n):
	popped_red = heapq.heappushpop(red, a[k])
	sr += a[k] - popped_red
	sum_red[k + 1] = sr
for k in range(2 * n - 1, n - 1, -1):
	popped_blue = heapq.heappushpop(blue, -1 * a[k])
	sb += -1 * a[k] - popped_blue
	sum_blue[k] = sb
ans = -1 * float('inf')
for k in range(n, 2 * n + 1):
	ans = max(ans, sum_red[k] + sum_blue[k])
print(ans)


import heapq

def solve(n):
	a = list(map(int, input().split()))
	leftHsum = [0 for i in range(n + 1)]
	leftH = a[0:n]
	heapq.heapify(leftH)
	leftHsum[0] = sum(leftH)
	for i in range(n):
		if leftH[0] < a[n + i]:
			leftHsum[i + 1] = leftHsum[i] - leftH[0] + a[n + i]
			heapq.heappop(leftH)
			heapq.heappush(leftH, a[n + i])
		else:
			leftHsum[i + 1] = leftHsum[i]
	rightHsum = [0 for i in range(n + 1)]
	rightH = list([-x for x in a[2 * n:3 * n]])
	heapq.heapify(rightH)
	rightHsum[0] = -sum(rightH)
	for i in range(n):
		if rightH[0] < -a[2 * n - i - 1]:
			rightHsum[i + 1] = rightHsum[i] + rightH[0] + a[2 * n - i - 1]
			heapq.heappop(rightH)
			heapq.heappush(rightH, -a[2 * n - i - 1])
		else:
			rightHsum[i + 1] = rightHsum[i]
	result = -1000000000000000000
	for i in range(n + 1):
		result = max(result, leftHsum[0 + i] - rightHsum[n - i])
	return result
n = int(input())
print(solve(n))


import heapq
n = int(input())
(a, b) = ([int(i) for i in input().split()], [])
for i in a:
	b.append(-i)
(x, y) = (a[:n], b[2 * n:])
heapq.heapify(x)
heapq.heapify(y)
(num, num2) = (sum(a[:n]), sum(a[2 * n:]))
(a2, b2) = ([num], [num2])
for i in range(n + 1, 2 * n + 1):
	j = 3 * n + 1 - i
	num += a[i - 1] - heapq.heappushpop(x, a[i - 1])
	num2 += a[j - 1] + heapq.heappushpop(y, b[j - 1])
	a2.append(num)
	b2.append(num2)
(b2, ans) = (b2[::-1], -float('inf'))
for i in range(n + 1):
	ans = max(ans, a2[i] - b2[i])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
big_a = []
for i in range(n):
	heapq.heappush(big_a, a[i])
small_a = []
for i in range(n):
	heapq.heappush(small_a, -a[3 * n - 1 - i])
now_big = sum(big_a)
now_small = -sum(small_a)
big_data = [now_big]
small_data = [now_small]
for k in range(n):
	now_big += a[k + n]
	heapq.heappush(big_a, a[k + n])
	now_big -= heapq.heappop(big_a)
	big_data.append(now_big)
	now_small += a[2 * n - 1 - k]
	heapq.heappush(small_a, -a[2 * n - 1 - k])
	now_small += heapq.heappop(small_a)
	small_data.append(now_small)
ans = -10 ** 18
for k in range(n + 1):
	ans = max(ans, big_data[k] - small_data[n - k])
print(ans)


def main():
	n = int(input())
	a = list(map(int, input().split()))
	from heapq import heapify, heappushpop
	fh = []
	l = a[:n]
	fh.append(sum(l))
	heapify(l)
	for i in a[n:2 * n]:
		if l[0] < i:
			fh.append(fh[-1] + i - heappushpop(l, i))
		else:
			fh.append(fh[-1])
	lh = []
	l = [-i for i in a[2 * n:]]
	lh.append(sum(l))
	heapify(l)
	for i in a[2 * n - 1:n - 1:-1]:
		if l[0] < -i:
			lh.append(lh[-1] - i - heappushpop(l, -i))
		else:
			lh.append(lh[-1])
	ans = fh[0] + lh[n]
	for i in range(1, n + 1):
		if ans < fh[i] + lh[n - i]:
			ans = fh[i] + lh[n - i]
	print(ans)
main()


def f(a):
	s = 0
	q = a[:n]
	s = sum(q)
	heapify(q)
	r = [s]
	for e in a[n:2 * n]:
		s += e - heappushpop(q, e)
		r += [s]
	return r
import sys
from heapq import *
r = reversed
(n, *a) = map(int, sys.stdin.read().split())
print(max(map(sum, zip(f(a), r(f([-e for e in r(a)]))))))


import heapq
N = int(input())
a = list(map(int, input().split()))
l = [None] * (N + 1)
r = [None] * (N + 1)
h = a[:N]
s = sum(h)
heapq.heapify(h)
l[0] = s
for i in range(N):
	heapq.heappush(h, a[i + N])
	s += a[i + N] - heapq.heappop(h)
	l[i + 1] = s
h = list(map(lambda x: -x, a[2 * N:]))
heapq.heapify(h)
s = sum(h)
r[-1] = s
for i in range(N):
	heapq.heappush(h, -a[-N - i - 1])
	s += -a[-N - i - 1] - heapq.heappop(h)
	r[-i - 2] = s
a = l[0] + r[0]
for i in range(1, N + 1):
	if a < l[i] + r[i]:
		a = l[i] + r[i]
print(a)


import heapq
N = int(input())
a = list(map(int, input().split()))
a1 = a[:N]
a2 = [-x for x in a[2 * N:]]
(sum1, sum2) = (sum(a1), -sum(a2))
heapq.heapify(a1)
heapq.heapify(a2)
(s1, s2) = ([sum1], [sum2])
for i in range(N):
	heapq.heappush(a1, a[N + i])
	m = heapq.heappop(a1)
	if a[N + i] > m:
		sum1 += a[N + i] - m
	s1.append(sum1)
	heapq.heappush(a2, -a[2 * N - 1 - i])
	m = -heapq.heappop(a2)
	if a[2 * N - 1 - i] < m:
		sum2 += a[2 * N - 1 - i] - m
	s2.append(sum2)
ans = -float('inf')
for i in range(N + 1):
	if ans < s1[i] - s2[N - i]:
		ans = s1[i] - s2[N - i]
print(ans)


import sys
input = sys.stdin.readline

def I():
	return int(input())

def MI():
	return map(int, input().split())

def LI():
	return list(map(int, input().split()))
import heapq

def main():
	mod = 10 ** 9 + 7
	N = I()
	a = LI()
	q1 = a[:N]
	s1 = [0] * (N + 1)
	s1[0] = sum(q1)
	heapq.heapify(q1)
	q2 = []
	heapq.heapify(q2)
	s2 = [0] * (N + 1)
	for i in range(N):
		b = a[-1 - i] * -1
		s2[0] += b
		heapq.heappush(q2, b)
	for i in range(N):
		bb = a[i + N]
		heapq.heappush(q1, bb)
		b = heapq.heappop(q1)
		s1[i + 1] = s1[i] + bb - b
		cc = a[-1 - N - i] * -1
		heapq.heappush(q2, cc)
		c = heapq.heappop(q2)
		s2[i + 1] = s2[i] + cc - c
	L = [0] * (N + 1)
	ans = -1 * 10 ** 16
	for i in range(N + 1):
		temp = s1[i] + s2[-1 - i]
		if ans < temp:
			ans = temp
	print(ans)
main()


from heapq import heapify, heappushpop
n = int(input())
a = list(map(int, input().split()))
a1 = a[:n]
heapify(a1)
a2 = a[n:2 * n]
a3 = [-i for i in a[2 * n:]]
heapify(a3)
b1 = [sum(a1)]
b2 = [sum(a3)]
for i in range(n):
	b1.append(b1[-1] + a2[i] - heappushpop(a1, a2[i]))
	b2.append(b2[-1] - heappushpop(a3, -a2[n - i - 1]) - a2[n - i - 1])
ans = b1[0] + b2[n]
for i in range(n + 1):
	ans = max(ans, b1[i] + b2[n - i])
print(ans)


import heapq
n = int(input())
a1 = []
b1 = []
a2 = []
b2 = []
s = input().split()
for i in range(3 * n):
	if i < n:
		a1.append(int(s[i]))
	elif i >= 2 * n:
		b1.append(-int(s[i]))
	else:
		a2.append(int(s[i]))
		b2.append(-int(s[3 * n - i - 1]))
suma = [sum(a1)]
sumb = [sum(b1)]
heapq.heapify(a1)
heapq.heapify(b1)
for i in range(0, n):
	heapq.heappush(a1, a2[i])
	k = heapq.heappop(a1)
	l = suma[-1]
	suma.append(l + a2[i] - k)
for i in range(0, n):
	heapq.heappush(b1, b2[i])
	k = heapq.heappop(b1)
	l = sumb[-1]
	sumb.append(l + b2[i] - k)
ma = -1000000000000000
for i in range(n + 1):
	ma = max(ma, suma[i] + sumb[-i - 1])
print(ma)


import heapq
N = int(input())
a = list(map(int, input().split()))
heap_left = []
left = 0
for i in range(N):
	left += a[i]
	heapq.heappush(heap_left, a[i])
lst_left = [left]
for i in range(N, 2 * N):
	tmp = heapq.heappushpop(heap_left, a[i])
	left = left - tmp + a[i]
	lst_left += [left]
heap_right = []
right = 0
for i in range(2 * N, 3 * N):
	right += a[i]
	heapq.heappush(heap_right, -1 * a[i])
lst_right = [right]
for i in range(2 * N - 1, N - 1, -1):
	tmp = heapq.heappushpop(heap_right, -1 * a[i])
	right = right - -1 * tmp + a[i]
	lst_right += [right]
ans = -1 * 10 ** 20
for i in range(N + 1):
	ans = max(ans, lst_left[i] - lst_right[-(i + 1)])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
leftQue = []
rightQue = []
leftSum = 0
rightSum = 0
for i in range(N):
	heapq.heappush(leftQue, A[i])
	leftSum += A[i]
	heapq.heappush(rightQue, -A[-1 - i])
	rightSum -= A[-1 - i]
left = [-float('inf') for _ in range(3 * N)]
right = [-float('inf') for _ in range(3 * N)]
left[N - 1] = leftSum
for middle in range(N, 2 * N):
	leftSum += A[middle]
	leftSum -= heapq.heappushpop(leftQue, A[middle])
	left[middle] = leftSum
right[2 * N - 1] = rightSum
for middle in range(2 * N - 1, N - 1, -1):
	rightSum -= A[middle]
	rightSum -= heapq.heappushpop(rightQue, -A[middle])
	right[middle - 1] = rightSum
ans = -float('inf')
for (l, r) in zip(left, right):
	ans = max(ans, l + r)
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
h = a[:n]
heapq.heapify(h)
first = [0] * (n + 1)
s = sum(a[:n])
first[0] = s
for i in range(n):
	s += a[n + i]
	heapq.heappush(h, a[n + i])
	s -= heapq.heappop(h)
	first[i + 1] = s
h = list(map(lambda x: -x, a[2 * n:]))
heapq.heapify(h)
second = [0] * (n + 1)
s = -sum(a[2 * n:])
second[0] = s
for i in range(n):
	s -= a[2 * n - i - 1]
	heapq.heappush(h, -a[2 * n - i - 1])
	s -= heapq.heappop(h)
	second[i + 1] = s
ans = -10 ** 18
for i in range(n + 1):
	ans = max(ans, first[i] + second[n - i])
print(ans)


import sys
readline = sys.stdin.readline
N = int(readline())
A = list(map(int, readline().split()))
from collections import defaultdict
sortA = sorted(A[:2 * N])
smallA = sortA[:N]
small_dic = defaultdict(int)
for i in range(len(smallA)):
	small_dic[smallA[i]] += 1
largeA = sortA[N:]
large_dic = defaultdict(int)
for i in range(len(largeA)):
	large_dic[largeA[i]] += 1
leftsum = sum(sortA[N:])
import heapq as hq
leftq = list([-x for x in smallA])
hq.heapify(leftq)
rightq = A[2 * N:]
rightsum = sum(rightq)
rightq = list([-x for x in rightq])
hq.heapify(rightq)
ans = leftsum - rightsum
for i in range(2 * N - 1, N - 1, -1):
	if large_dic[A[i]] > 0:
		large_dic[A[i]] -= 1
		leftsum -= A[i]
		while True:
			move = -hq.heappop(leftq)
			if small_dic[move] > 0:
				small_dic[move] -= 1
				break
		leftsum += move
		large_dic[move] += 1
	else:
		small_dic[A[i]] -= 1
	hq.heappush(rightq, -A[i])
	rem = -hq.heappop(rightq)
	rightsum += A[i]
	rightsum -= rem
	if ans < leftsum - rightsum:
		ans = leftsum - rightsum
print(ans)


N = int(input())
a = list(map(int, input().split()))
a1h = a[:N]
a2h = [-ai for ai in a[2 * N:]]
import heapq
heapq.heapify(a1h)
heapq.heapify(a2h)
sum1 = [sum(a1h)]
sum2 = [sum(a2h)]
for k in range(N, 2 * N):
	sum1.append(sum1[-1] + a[k] - heapq.heappushpop(a1h, a[k]))
	sum2.append(sum2[-1] + -a[-k - 1] - heapq.heappushpop(a2h, -a[-k - 1]))
print(max(map(sum, zip(sum1, sum2[::-1]))))


n = int(input())
a = list(map(int, input().split()))
import heapq
lefts = a[:n]
lefts_sums = [sum(lefts)]
heapq.heapify(lefts)
for x in range(n, 2 * n):
	l = heapq.heappop(lefts)
	if l < a[x]:
		heapq.heappush(lefts, a[x])
		lefts_sums.append(lefts_sums[-1] - l + a[x])
	else:
		heapq.heappush(lefts, l)
		lefts_sums.append(lefts_sums[-1])
rights = [-_a for _a in a[2 * n:]]
rights_sums = [sum(rights)]
heapq.heapify(rights)
for x in reversed(range(n, 2 * n)):
	r = heapq.heappop(rights)
	if r < -a[x]:
		heapq.heappush(rights, -a[x])
		rights_sums.append(rights_sums[-1] - r - a[x])
	else:
		heapq.heappush(rights, r)
		rights_sums.append(rights_sums[-1])
rights_sums = rights_sums[::-1]
ans = -float('inf')
for i in range(len(lefts_sums)):
	ans = max(ans, lefts_sums[i] + rights_sums[i])
print(ans)


import heapq
N = int(input())
alist = list(map(int, input().split()))
sum1 = 0
hq1 = []
for i in range(N):
	sum1 += alist[i]
	heapq.heappush(hq1, alist[i])
sum1_list = [sum1]
for i in range(N, 2 * N):
	heapq.heappush(hq1, alist[i])
	min_s1 = heapq.heappop(hq1)
	sum1 += alist[i] - min_s1
	sum1_list.append(sum1)
alist_rev = alist[::-1]
sum2 = 0
hq2 = []
for i in range(N):
	sum2 += alist_rev[i]
	heapq.heappush(hq2, -alist_rev[i])
sum2_list = [sum2]
for i in range(N, 2 * N):
	heapq.heappush(hq2, -alist_rev[i])
	max_s2 = -heapq.heappop(hq2)
	sum2 += alist_rev[i] - max_s2
	sum2_list.append(sum2)
sum2_list.reverse()
answer = -float('inf')
for i in range(N + 1):
	answer = max(answer, sum1_list[i] - sum2_list[i])
print(answer)


import sys
import heapq

def main():
	N = int(input())
	a = list(map(int, input().split()))
	left = a[0:N]
	right = a[N * 2:N * 3]
	for i in range(N):
		right[i] *= -1
	left_sum = 0
	right_sum = 0
	heap_left = []
	heap_right = []
	for i in range(N):
		left_sum += left[i]
		heapq.heappush(heap_left, left[i])
		right_sum += right[i]
		heapq.heappush(heap_right, right[i])
	temp1 = [0] * (N + 1)
	temp2 = [0] * (N + 1)
	temp1[0] = left_sum
	temp2[N] = right_sum
	for i in range(0, N):
		left_sum += a[N + i]
		heapq.heappush(heap_left, a[N + i])
		left_sum -= heapq.heappop(heap_left)
		temp1[i + 1] = left_sum
	for i in range(0, N):
		right_sum -= a[N * 2 - 1 - i]
		heapq.heappush(heap_right, -a[N * 2 - 1 - i])
		right_sum -= heapq.heappop(heap_right)
		temp2[N - 1 - i] = right_sum
	ans = -100000000000000000000000000000000000000000
	for i in range(0, N + 1):
		x = temp1[i] + temp2[i]
		if ans < x:
			ans = x
	print(ans)
main()


import heapq
n = int(input())
alist = list(map(int, input().split()))
(ante, post) = (alist[:n], alist[-n:])
antesums = [0 for _ in range(n + 1)]
postsums = [0 for _ in range(n + 1)]
antesums[0] = sum(ante)
postsums[0] = sum(post)
post = list(map(lambda x: -x, post))
heapq.heapify(ante)
heapq.heapify(post)
for k in range(n):
	minante = heapq.heappushpop(ante, alist[n + k])
	antesums[k + 1] = antesums[k] + alist[n + k] - minante
	maxpost = heapq.heappushpop(post, -alist[2 * n - k - 1])
	postsums[k + 1] = postsums[k] + alist[2 * n - k - 1] + maxpost
ans = -sum(alist)
for k in range(n + 1):
	if ans < antesums[k] - postsums[-k - 1]:
		ans = antesums[k] - postsums[-k - 1]
print(ans)


import heapq as hq
n = int(input())
a = list(map(int, input().split()))
x = sum(a[:n])
y = sum(a[2 * n:])
fsum = [x]
lsum = [y]
hqx = a[:n]
hqy = [-a[2 * n + i] for i in range(n)]
hq.heapify(hqx)
hq.heapify(hqy)
for i in range(n):
	hq.heappush(hqx, a[n + i])
	hq.heappush(hqy, -a[2 * n - i - 1])
	xmin = hq.heappop(hqx)
	ymax = -hq.heappop(hqy)
	fsum.append(fsum[-1] + a[n + i] - xmin)
	lsum.append(lsum[-1] + a[2 * n - i - 1] - ymax)
ans = -10 ** 18
for i in range(n + 1):
	ans = max(ans, fsum[i] - lsum[-i - 1])
print(ans)


import sys
from heapq import heapify, heappushpop
fin = sys.stdin.readline
N = int(fin())
a_list = [int(elem) for elem in fin().split()]
left_pq = a_list[:N]
right_pq = [-item for item in a_list[2 * N:]]
heapify(left_pq)
heapify(right_pq)
left_sum = [sum(left_pq)]
right_sum = [sum(right_pq)]
for k in range(N, 2 * N):
	left_item = a_list[k]
	right_item = a_list[-k - 1]
	left_sum.append(left_sum[-1] - heappushpop(left_pq, left_item) + left_item)
	right_sum.append(right_sum[-1] - heappushpop(right_pq, -right_item) - right_item)
max_sum = max(map(sum, zip(left_sum, right_sum[::-1])))
print(max_sum)


import heapq
N = int(input())
a = list(map(int, input().split()))
left = []
for i in a[:N]:
	heapq.heappush(left, i)
right = []
for i in a[2 * N:3 * N]:
	heapq.heappush(right, -i)
left_sum = [sum(left)]
right_sum = [-sum(right)]
for k in range(N, 2 * N):
	heapq.heappush(left, a[k])
	v = heapq.heappop(left)
	left_sum.append(left_sum[-1] + a[k] - v)
for k in range(2 * N - 1, N - 1, -1):
	heapq.heappush(right, -a[k])
	v = heapq.heappop(right)
	right_sum.append(right_sum[-1] + a[k] + v)
print(max([a - b for (a, b) in zip(left_sum, right_sum[::-1])]))


from heapq import heappush, heappop, heapify
n = int(input())
lst = list(map(int, input().split()))
preQue = sorted(lst[:n])
mid = lst[n:2 * n]
sufQue = sorted([-i for i in lst[2 * n:]])
preScore = sum(preQue)
preScores = [preScore]
heapify(preQue)
for i in mid:
	v = heappop(preQue)
	if v < i:
		preScore += i - v
		heappush(preQue, i)
	else:
		heappush(preQue, v)
	preScores.append(preScore)
sufScore = sum(sufQue)
sufScores = [sufScore]
heapify(sufQue)
for i in mid[::-1]:
	v = heappop(sufQue)
	if -v > i:
		sufScore += -v - i
		heappush(sufQue, -i)
	else:
		heappush(sufQue, v)
	sufScores.append(sufScore)
sufScores.reverse()
ans = max([p + s for (p, s) in zip(preScores, sufScores)])
print(ans)


N = int(input())
A = list(map(int, input().split()))
h1 = A[:N]
L = [0 for i in range(N + 1)]
L[0] = sum(h1)
sum1 = sum(h1)
import heapq
heapq.heapify(h1)
for i in range(N):
	heapq.heappush(h1, A[N + i])
	a = heapq.heappop(h1)
	sum1 = sum1 + A[N + i] - a
	L[i + 1] = sum1
h = A[2 * N:]
h2 = [-i for i in h]
R = [0 for i in range(N + 1)]
R[N] = -sum(h2)
sum2 = -sum(h2)
heapq.heapify(h2)
for i in range(N):
	heapq.heappush(h2, -A[2 * N - 1 - i])
	a = heapq.heappop(h2)
	sum2 = sum2 + A[2 * N - 1 - i] + a
	R[N - i - 1] = sum2
import math
ans = -math.inf
for i in range(N + 1):
	ans = max(ans, L[i] - R[i])
print(ans)


import heapq

def main():
	N = int(input())
	A = list(map(int, input().split()))
	AH = sorted([(a, i) for (i, a) in enumerate(A[:2 * N])], reverse=True)
	AT = sorted(A[-N:])
	ATT = []
	for a in AT:
		heapq.heappush(ATT, -a)
	used = [False] * (2 * N)
	for (_, i) in AH[:N]:
		used[i] = True
	h = sum((a for (a, _) in AH[:N]))
	t = sum(AT)
	m = h - t
	hp = N
	for i in reversed(range(N, 2 * N)):
		t += A[i]
		t += heapq.heappushpop(ATT, -A[i])
		if used[i]:
			h -= A[i]
			while AH[hp][1] > i:
				hp += 1
			h += AH[hp][0]
			used[AH[hp][1]] = True
			hp += 1
		m = max(m, h - t)
	return m
print(main())


import sys
from heapq import *
input = sys.stdin.readline

def main():
	n = int(input())
	a = list(map(int, input().split()))
	af = a[:n]
	ab = [-v for v in a[2 * n:]]
	af_sum = sum(af)
	ab_sum = -sum(ab)
	heapify(af)
	heapify(ab)
	judge = [0] * (n + 1)
	judge[0] += af_sum
	judge[n] -= ab_sum
	for i in range(n):
		if a[n + i] > af[0]:
			af_sum -= heappop(af)
			heappush(af, a[n + i])
			af_sum += a[n + i]
		judge[i + 1] += af_sum
		if -a[2 * n - 1 - i] > ab[0]:
			ab_sum += heappop(ab)
			heappush(ab, -a[2 * n - 1 - i])
			ab_sum += a[2 * n - 1 - i]
		judge[n - 1 - i] -= ab_sum
	ans = max(judge)
	print(ans)
main()


import heapq
N = int(input())
a_list = list(map(int, input().split()))
max_score = -float('inf')
red_list = a_list[:N]
blue_list = [-a for a in a_list[2 * N:]]
heapq.heapify(red_list)
heapq.heapify(blue_list)
red_sum = [sum(red_list)]
blue_sum = [sum(blue_list)]
for i in range(N, 2 * N):
	heapq.heappush(red_list, a_list[i])
	item = heapq.heappop(red_list)
	red_sum.append(max(red_sum[-1], red_sum[-1] + a_list[i] - item))
for i in range(2 * N - 1, N - 1, -1):
	heapq.heappush(blue_list, -a_list[i])
	item = heapq.heappop(blue_list)
	blue_sum.append(max(blue_sum[-1], blue_sum[-1] - a_list[i] - item))
for i in range(N + 1):
	score = red_sum[i] + blue_sum[-(i + 1)]
	if max_score < score:
		max_score = score
print(max_score)


from heapq import heapify, heappushpop
n = int(input())
aa = list(map(int, input().split()))
former = aa[:n]
latter = [-a for a in aa[2 * n:]]
fs = sum(former)
ls = sum(latter)
heapify(former)
heapify(latter)
results = [0] * (n + 1)
results[0] = fs
results[-1] = ls
for i in range(n, 2 * n):
	a = aa[i]
	k = heappushpop(former, a)
	fs += a - k
	results[i - n + 1] += fs
for i in range(2 * n - 1, n - 1, -1):
	a = -aa[i]
	k = heappushpop(latter, a)
	ls += a - k
	results[i - n] += ls
print(max(results))


import heapq
import copy
N = int(input())
A = list(map(int, input().split()))
ca = copy.deepcopy(A)
fsl = [0 for i in range(N + 1)]
f = ca[:N]
heapq.heapify(f)
fs = sum(f)
fsl[0] = fs
for i in range(N, 2 * N):
	heapq.heappush(f, A[i])
	fs = fs + A[i] - heapq.heappop(f)
	fsl[i - N + 1] = fs
lsl = [0 for i in range(N + 1)]
l = list(map(lambda x: -x, ca[2 * N:]))
heapq.heapify(l)
ls = sum(l)
lsl[-1] = ls
for i in range(N, 2 * N):
	heapq.heappush(l, -A[3 * N - i - 1])
	ls = ls - A[3 * N - i - 1] - heapq.heappop(l)
	lsl[2 * N - i - 1] = ls
ans = -10 ** 20
for i in range(N + 1):
	ans = max(ans, fsl[i] + lsl[i])
print(ans)


import heapq
N = int(input())
A = [int(x) for x in input().split()]
B = [[0, 0] for i in range(N + 1)]
A1 = A[:N]
B[0][0] = sum(A1)
heapq.heapify(A1)
for i in range(N):
	B[i + 1][0] = B[i][0]
	B[i + 1][0] += A[N + i]
	heapq.heappush(A1, A[N + i])
	B[i + 1][0] -= heapq.heappop(A1)
A2 = [-a for a in A[2 * N:]]
B[N][1] = -sum(A2)
heapq.heapify(A2)
for i in range(N):
	B[N - i - 1][1] = B[N - i][1]
	B[N - i - 1][1] += A[2 * N - i - 1]
	heapq.heappush(A2, -A[2 * N - i - 1])
	B[N - i - 1][1] += heapq.heappop(A2)
ans = -10 ** 18
for (b0, b1) in B:
	ans = max(b0 - b1, ans)
print(ans)


from heapq import heapify, heappushpop
(n, *a) = map(int, open(0).read().split())
q = a[:n]
heapify(q)
x = [sum(q)]
for k in range(n, 2 * n):
	v = heappushpop(q, a[k])
	x.append(x[-1] + a[k] - v)
a = a[::-1]
q = [-v for v in a[:n]]
heapify(q)
y = [-sum(q)]
for k in range(n, 2 * n):
	v = -heappushpop(q, -a[k])
	y.append(y[-1] + a[k] - v)
print(max((v - w for (v, w) in zip(x, y[::-1]))))


import sys
import heapq

def minus(n):
	return -n

def solve(N: int, a: 'List[int]'):
	left_sum = [0] * (N + 1)
	heap = a[:N]
	left_sum[0] = sum(heap)
	heapq.heapify(heap)
	for i in range(N, 2 * N):
		heapq.heappush(heap, a[i])
		min_value = heapq.heappop(heap)
		left_sum[i - (N - 1)] = left_sum[i - N] + a[i] - min_value
	b = list(map(minus, reversed(a)))
	right_sum = [0] * (N + 1)
	r_heap = b[:N]
	right_sum[0] = -sum(r_heap)
	heapq.heapify(r_heap)
	for i in range(N, 2 * N):
		heapq.heappush(r_heap, b[i])
		min_value = heapq.heappop(r_heap)
		right_sum[i - (N - 1)] = right_sum[i - N] + -b[i] - -min_value
	answer = -10 ** 15
	for j in range(N + 1):
		answer = max(answer, left_sum[j] - right_sum[N - j])
	print(answer)
	return

def main():

	def iterate_tokens():
		for line in sys.stdin:
			for word in line.split():
				yield word
	tokens = iterate_tokens()
	N = int(next(tokens))
	a = [int(next(tokens)) for _ in range(3 * N)]
	solve(N, a)

def __starting_point():
	main()
__starting_point()


maxi = -10 ** 99
n = int(input())
import heapq
l = [int(i) for i in input().split()]
k = n
sm = sum(l[0:n])
z1 = [0] * (n + 1)
z2 = [0] * (n + 1)
h = []
z1[0] = sm
j = 1
heapq.heapify(h)
for i in range(n):
	heapq.heappush(h, l[i])
for i in range(n, 2 * n):
	p = l[i]
	if p > h[0]:
		sm += p
		sm -= h[0]
		heapq.heappop(h)
		heapq.heappush(h, p)
	else:
		pass
	z1[j] = sm
	j += 1
sm = sum(l[2 * n:3 * n])
h = []
heapq.heapify(h)
sm = 0
for i in range(2 * n, 3 * n):
	heapq.heappush(h, -l[i])
	sm += l[i]
j = n
z2[j] = sm
j -= 1
for i in range(2 * n - 1, n - 1, -1):
	p = -l[i]
	if p > h[0]:
		sm = sm + h[0] - p
		heapq.heappop(h)
		heapq.heappush(h, p)
	else:
		pass
	z2[j] = sm
	j -= 1
maxi = -10 ** 99
for i in range(n + 1):
	maxi = max(maxi, z1[i] - z2[i])
print(maxi)


from collections import deque
from heapq import heapify, heappop, heappush
N = int(input())
tmp = list(map(int, input().split(' ')))
former_A = deque(tmp)
latter_A = deque(tmp.copy())
former_heap = list()
latter_heap = list()
for _ in range(N):
	former_heap.append(former_A.popleft())
	latter_heap.append(-latter_A.pop())
heapify(former_heap)
heapify(latter_heap)
former_sum = sum(former_heap)
former_sum_list = [former_sum]
for k in range(N):
	new_a = former_A.popleft()
	heappush(former_heap, new_a)
	min_a = heappop(former_heap)
	former_sum += new_a - min_a
	former_sum_list.append(former_sum)
latter_sum = sum(latter_heap)
latter_sum_list = [latter_sum]
for k in range(N):
	new_a = -latter_A.pop()
	heappush(latter_heap, new_a)
	min_a = heappop(latter_heap)
	latter_sum += new_a - min_a
	latter_sum_list.append(latter_sum)
latter_sum_list.reverse()
answer = max([former + latter for (former, latter) in zip(former_sum_list, latter_sum_list)])
print(answer)


import heapq

def main():
	N = int(input())
	A = list(map(int, input().split()))
	X = [0] * (N + 1)
	X[0] = sum(A[:N])
	Y = [0] * (N + 1)
	Y[0] = sum(A[2 * N:])
	h = A[:N]
	heapq.heapify(h)
	for i in range(N):
		heapq.heappush(h, A[N + i])
		minimum = heapq.heappop(h)
		X[i + 1] = X[i] + A[N + i] - minimum
	h = [-x for x in A[2 * N:]]
	heapq.heapify(h)
	for i in range(N):
		heapq.heappush(h, -A[2 * N - 1 - i])
		maximum = -heapq.heappop(h)
		Y[i + 1] = Y[i] + A[2 * N - 1 - i] - maximum
	ans = -float('inf')
	for i in range(N + 1):
		ans = max(ans, X[i] - Y[N - i])
	print(ans)
main()


from heapq import heappush, heapreplace
N = int(input())
A = list(map(int, input().split()))
dp = [0] * (N + 1)
q = []
cnt = 0
for i in range(N):
	a = A[i]
	heappush(q, a)
	cnt += a
dp[0] = cnt
for i in range(N, 2 * N):
	a = A[i]
	if a > q[0]:
		cnt += a - heapreplace(q, a)
	dp[i - N + 1] = cnt
dp2 = [0] * (N + 1)
q = []
cnt = 0
for i in range(2 * N, 3 * N):
	a = A[i]
	heappush(q, -a)
	cnt += a
dp2[N] = cnt
for i in range(2 * N - 1, N - 1, -1):
	a = A[i]
	if a < -q[0]:
		cnt += a - -heapreplace(q, -a)
	dp2[i - N] = cnt
ans = -float('inf')
for i in range(N + 1):
	ans = max(ans, dp[i] - dp2[i])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
a1 = a[:n]
s1 = []
ts = sum(a1)
s1.append(ts)
heapq.heapify(a1)
for i in range(n, n * 2):
	ts += a[i]
	heapq.heappush(a1, a[i])
	ts -= heapq.heappop(a1)
	s1.append(ts)
a2 = a[n * 2:]
a2 = list(map(lambda x: x * -1, a2))
s2 = []
ts = sum(a2)
s2.append(ts)
heapq.heapify(a2)
for i in range(n * 2 - 1, n - 1, -1):
	ts -= a[i]
	heapq.heappush(a2, a[i] * -1)
	ts -= heapq.heappop(a2)
	s2.append(ts)
res = -10 ** 20
for i in range(n + 1):
	res = max(res, s1[i] + s2[n - i])
print(res)


N = int(input())
import heapq as h
A = list(map(int, input().split()))
(sum_red, sum_blue) = ([], [])
head = A[:N]
tail = [-x for x in A[-N:]]
h.heapify(head)
h.heapify(tail)
sum_red.append(sum(head))
sum_blue.append(-sum(tail))
for k in range(N, 2 * N):
	num_sub = h.heappushpop(head, A[k])
	sum_red.append(sum_red[-1] - num_sub + A[k])
	num_sub = -h.heappushpop(tail, -A[-k - 1])
	sum_blue.append(sum_blue[-1] - num_sub + A[-k - 1])
print(max([r - b for (r, b) in zip(sum_red, sum_blue[::-1])]))


import bisect
N = int(input())
A = list(map(int, input().split()))
L = sorted(A[:2 * N])
sumL = sum(L[N:])
R = sorted(A[N:])
sumR = sum(R[:N])
AL = [sumL]
p = N
BL = [False] * (2 * N)
for a in reversed(A[N:2 * N]):
	ind = bisect.bisect_left(L, a)
	if BL[ind] != False:
		BL[ind] += 1
		ind += BL[ind] - 1
	if ind >= p:
		sumL -= L[ind]
		p -= 1
		while BL[p] != False:
			p -= 1
		sumL += L[p]
	AL.append(sumL)
	BL[ind] = 1
AR = [sumR]
p = N - 1
BR = [False] * (2 * N)
for a in A[N:2 * N]:
	ind = bisect.bisect_left(R, a)
	if BR[ind] != False:
		BR[ind] += 1
		ind += BR[ind] - 1
	if ind <= p:
		sumR -= R[ind]
		p += 1
		while BR[p] != False:
			p += 1
		sumR += R[p]
	AR.append(sumR)
	BR[ind] = 1
AL.reverse()
C = [AL[i] - AR[i] for i in range(N + 1)]
print(max(C))


import heapq
n = int(input())
a = list(map(int, input().split()))
p = [0] * (n + 1)
hq = a[:n]
heapq.heapify(hq)
for i in range(n, 2 * n):
	heapq.heappush(hq, a[i])
	p[i + 1 - n] = heapq.heappop(hq) + p[i - n]
q = [0] * (n + 1)
hq = list(map(lambda x: -x, a[2 * n:]))
heapq.heapify(hq)
for i in range(2 * n, n, -1):
	heapq.heappush(hq, -a[i - 1])
	q[i - 1 - n] = -heapq.heappop(hq) + q[i - n]
s = sum(a[:n])
t = sum(a[n:])
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, s - t + q[i] - p[i])
	s += a[n + i]
	t -= a[n + i]
print(ans)


import heapq

class Heapq:

	def __init__(self, arr, desc=False):
		if desc:
			arr = [-a for a in arr]
		self.sign = -1 if desc else 1
		self.hq = arr
		heapq.heapify(self.hq)

	def pop(self):
		return heapq.heappop(self.hq) * self.sign

	def push(self, a):
		heapq.heappush(self.hq, a * self.sign)

	def top(self):
		return self.hq[0] * self.sign
n = int(input())
A = list(map(int, input().split()))
heap_l = Heapq(A[:n])
heap_r = Heapq(A[2 * n:], desc=True)
max_l = [0] * (n + 1)
min_r = [0] * (n + 1)
max_l[0] = sum(A[:n])
min_r[0] = sum(A[2 * n:])
for i in range(n):
	p = heap_l.pop()
	heap_l.push(max(A[n + i], p))
	max_l[i + 1] = max_l[i] + max(0, A[n + i] - p)
	q = heap_r.pop()
	heap_r.push(min(A[-1 - i - n], q))
	min_r[i + 1] = min_r[i] + min(0, A[-1 - i - n] - q)
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, max_l[i] - min_r[-1 - i])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
Af = A[:N]
Ab = [-i for i in A[2 * N:]]
asum = sum(Af)
bsum = -sum(Ab)
bsum2 = -sum(Ab)
heapq.heapify(Af)
heapq.heapify(Ab)
flist = [sum(Af)]
blist = []
for i in range(N, 2 * N):
	mina = heapq.heappop(Af)
	if A[i] > mina:
		asum = asum - mina + A[i]
		flist.append(asum)
		heapq.heappush(Af, A[i])
	else:
		flist.append(asum)
		heapq.heappush(Af, mina)
for i in range(2 * N - 1, N - 1, -1):
	maxa = heapq.heappop(Ab)
	if -A[i] > maxa:
		bsum2 = bsum2 + maxa + A[i]
		blist.append(bsum2)
		heapq.heappush(Ab, -A[i])
	else:
		blist.append(bsum2)
		heapq.heappush(Ab, maxa)
blist = blist[::-1]
ans = []
blist.append(bsum)
for i in range(N + 1):
	ans.append(flist[i] - blist[i])
print(max(ans))


import sys, heapq

def _heappush_max(heap, item):
	heap.append(item)
	heapq._siftdown_max(heap, 0, len(heap) - 1)

def _heappop_max(heap):
	lastelt = heap.pop()
	if heap:
		returnitem = heap[0]
		heap[0] = lastelt
		heapq._siftup_max(heap, 0)
		return returnitem
	return lastelt
n = int(input())
a = list(map(int, input().split()))
res = [0] * (n + 1)
head = a[:n]
heapq.heapify(head)
p = sum(head)
for i in range(n + 1):
	res[i] = p
	p += a[n + i]
	heapq.heappush(head, a[n + i])
	p -= heapq.heappop(head)
end = a[2 * n:]
heapq._heapify_max(end)
q = sum(end)
for i in range(n + 1):
	res[n - i] -= q
	q += a[2 * n - 1 - i]
	_heappush_max(end, a[2 * n - 1 - i])
	q -= _heappop_max(end)
print(max(res))


from heapq import heappush, heappop
n = int(input())
a = input().split()
a = [int(m) for m in a]
t1 = []
t2 = []
mt3 = []
for i in range(3 * n):
	if i < 3 * n // 3:
		t1.append(a[i])
	elif 3 * n // 3 <= i < 3 * n // 3 * 2:
		t2.append(a[i])
	else:
		mt3.append(-a[i])
t1.sort()
mt3.sort()
t1sumli = [sum(t1)]
t3sumli = [-sum(mt3)]
for i in range(n):
	pp = heappop(t1)
	heappush(t1, max(pp, t2[i]))
	t1sumli.append(t1sumli[-1] - pp + max(pp, t2[i]))
for i in range(n - 1, -1, -1):
	qq = -heappop(mt3)
	heappush(mt3, -min(qq, t2[i]))
	t3sumli.append(t3sumli[-1] - qq + min(qq, t2[i]))
sumli = []
for i in range(n + 1):
	sumli.append(t1sumli[i] - t3sumli[-i - 1])
print(max(sumli))


import heapq
N = int(input())
A = list(map(int, input().split()))
(l, r) = ([], [])
ll = 0
for i in range(3 * N):
	if i < N:
		heapq.heappush(l, (A[i], i))
		ll += A[i]
	else:
		heapq.heappush(r, (A[i], i))
used = set()
rr = 0
for i in range(N):
	(a, idx) = heapq.heappop(r)
	used.add(idx)
	rr += a
ans = ll - rr
done = set()
for i in range(N, 2 * N):
	done.add(i)
	if A[i] > l[0][0]:
		ll -= l[0][0]
		heapq.heappop(l)
		heapq.heappush(l, (A[i], i))
		ll += A[i]
	if i in used:
		rr -= A[i]
		(a, idx) = heapq.heappop(r)
		while idx in done:
			(a, idx) = heapq.heappop(r)
		used.add(idx)
		rr += a
	ans = max(ans, ll - rr)
print(ans)


from heapq import heappush, heappop
dataX = []
dataY = []
mae = dict()
ushiro = dict()
N = int(input())
A = list(map(int, input().split()))
X = A[0:N]
Y = A[N:2 * N]
Z = A[2 * N:3 * N]
for i in range(N):
	heappush(dataX, X[i])
	heappush(dataY, -1 * Z[i])
mae[0] = sum(X)
ushiro[0] = -1 * sum(Z)
for i in range(1, N + 1):
	mae[i] = mae[i - 1] + Y[i - 1]
	heappush(dataX, Y[i - 1])
	mae[i] -= heappop(dataX)
	ushiro[i] = ushiro[i - 1] - Y[N - i]
	heappush(dataY, -1 * Y[N - i])
	ushiro[i] -= heappop(dataY)
ans = -1 * float('inf')
for i in range(N + 1):
	ans = max(ans, mae[i] + ushiro[N - i])
print(ans)


import heapq
N = int(input())
A = list(map(int, input().split()))
(left, right) = (A[:N], [-1 * i for i in A[2 * N:]])
(sum_left, sum_right) = (sum(left), sum(right))
results = [0] * (N + 1)
results[0] = sum_left
results[N] = sum_right
heapq.heapify(left)
heapq.heapify(right)
for i in range(N, 2 * N):
	v = A[i]
	p = heapq.heappushpop(left, v)
	sum_left += v - p
	results[i - N + 1] += sum_left
for i in range(2 * N - 1, N - 1, -1):
	v = -1 * A[i]
	p = heapq.heappushpop(right, v)
	sum_right += v - p
	results[i - N] += sum_right
print(max(results))


import sys
import os
import heapq
N = int(input())
A = list(map(int, input().split()))
B = A[:N]
B_sum = sum(B)
heapq.heapify(B)
dict_b = {}
for i in range(N, 2 * N):
	a = A[i]
	min_val = heapq.heappop(B)
	greater = max(a, min_val)
	heapq.heappush(B, greater)
	if greater != min_val:
		B_sum += a - min_val
	dict_b[i] = B_sum
C = A[-N:]
C = [-c for c in C]
C_sum = -1 * sum(C)
heapq.heapify(C)
dict_c = {}
for i in range(2 * N - 1, N - 1, -1):
	a = A[i]
	max_val = -1 * heapq.heappop(C)
	fewer = min(a, max_val)
	heapq.heappush(C, -fewer)
	if fewer != max_val:
		C_sum -= max_val - a
	dict_c[i] = C_sum
max_score = max(sum(A[:N]) - dict_c[N], dict_b[2 * N - 1] - sum(A[-N:]))
for i in range(N, 2 * N - 1):
	score = dict_b[i] - dict_c[i + 1]
	if score > max_score:
		max_score = score
print(max_score)


class HeapQueue:
	from heapq import heappop, heappush, heappushpop, heapreplace

	def __init__(self, reverse=False):
		self.reverse = reverse
		self.heap = []

	def __len__(self):
		return len(self.heap)

	def append(self, p, v):
		self.heappush(self.heap, (-p if self.reverse else p, v))

	def appendpop(self, p, v):
		return self.heappushpop(self.heap, (-p if self.reverse else p, v))[1]

	def popappend(self, p, v):
		return self.heapreplace(self.heap, (-p if self.reverse else p, v))[1]

	def pop(self):
		return self.heappop(self.heap)[1]

	def front(self):
		return self.heap[0][1]
N = int(input())
A = [int(s) for s in input().split()]
S = []
T = []
S.append(sum(A[:N]))
q = HeapQueue()
for a in A[:N]:
	q.append(a, a)
for a in A[N:2 * N]:
	m = q.appendpop(a, a)
	S.append(S[-1] + a - m)
T.append(sum(A[-N:]))
q = HeapQueue(reverse=True)
for a in A[-N:]:
	q.append(a, a)
for a in A[-N - 1:N - 1:-1]:
	m = q.appendpop(a, a)
	T.append(T[-1] + a - m)
ans = max([S[i] - T[N - i] for i in range(N + 1)])
print(ans)


import heapq
n = int(input())
a = list(map(int, input().split()))
maxL = []
l = []
for i in range(n):
	l.append(a[i])
s = sum(l)
maxL.append(s)
heapq.heapify(l)
for i in range(n, 2 * n):
	heapq.heappush(l, a[i])
	s += a[i]
	s -= heapq.heappop(l)
	maxL.append(s)
minL = []
l2 = []
for i in range(2 * n, 3 * n):
	l2.append(-a[i])
s2 = sum(l2)
minL.append(s2 * -1)
heapq.heapify(l2)
for i in range(2 * n - 1, n - 1, -1):
	heapq.heappush(l2, -a[i])
	s2 -= a[i]
	s2 -= heapq.heappop(l2)
	minL.append(s2 * -1)
minL.reverse()
ans = []
for i in range(n + 1):
	ans.append(maxL[i] - minL[i])
print(max(ans))


import heapq
N = int(input())
a = [int(i) for i in input().split()]
red = [0 for i in range(N + 1)]
blue = [0 for i in range(N + 1)]
r = list(a[:N])
b = list([-i for i in a[2 * N:]])
heapq.heapify(r)
heapq.heapify(b)
red[0] = sum(a[:N])
for i in range(N):
	k = i + N
	tmp1 = a[k]
	heapq.heappush(r, a[k])
	tmp2 = heapq.heappop(r)
	red[i + 1] = red[i] - tmp2 + tmp1
blue[-1] = sum(a[2 * N:])
for i in range(N)[::-1]:
	k = i + N
	tmp1 = a[k]
	heapq.heappush(b, -a[k])
	tmp2 = -heapq.heappop(b)
	blue[i] = blue[i + 1] - tmp2 + tmp1
ans = [red[i] - blue[i] for i in range(N + 1)]
print(max(ans))


from heapq import heappop, heappush
inf = float('inf')
N = int(input())
A = list(map(int, input().split()))
l = []
res = 0
for i in range(N):
	heappush(l, A[i])
	res += A[i]
ls = []
ls.append(res)
for i in range(N, 2 * N):
	heappush(l, A[i])
	res += A[i]
	res -= heappop(l)
	ls.append(res)
A.reverse()
s = []
res = 0
for i in range(N):
	heappush(s, -A[i])
	res += A[i]
ss = []
ss.append(res)
for i in range(N, 2 * N):
	heappush(s, -A[i])
	res += A[i]
	res -= -heappop(s)
	ss.append(res)
ss.reverse()
ans = -inf
for i in range(N + 1):
	score = ls[i] - ss[i]
	ans = max(ans, score)
print(ans)


import heapq
N = int(input())
src = list(map(int, input().split()))
lsum = sum(src[:N])
lmem = [lsum]
lq = src[:N][:]
heapq.heapify(lq)
for a in src[N:2 * N]:
	if a <= lq[0]:
		lmem.append(lmem[-1])
	else:
		lsum += a - heapq.heappop(lq)
		heapq.heappush(lq, a)
		lmem.append(lsum)
rq = [-a for a in src[-N:]]
rsum = sum(rq)
rmem = [rsum]
heapq.heapify(rq)
for a in reversed(src[N:2 * N]):
	if -a <= rq[0]:
		rmem.append(rmem[-1])
	else:
		rsum += -a - heapq.heappop(rq)
		heapq.heappush(rq, -a)
		rmem.append(rsum)
ans = -float('inf')
for (l, r) in zip(lmem, rmem[::-1]):
	ans = max(ans, l + r)
print(ans)


import heapq
n = int(input())
An = list(map(int, input().split()))
former = An[:n]
latter = An[2 * n:]
latter = list(map(lambda x: -x, latter))
heapq.heapify(former)
heapq.heapify(latter)
sum_former = sum(former)
sum_latter = sum(latter)
former_list = [0] * (n + 1)
latter_list = [0] * (n + 1)
former_list[0] = sum_former
latter_list[0] = sum_latter
for i in range(n, 2 * n):
	heapq.heappush(former, An[i])
	m = heapq.heappop(former)
	former_list[i - n + 1] = former_list[i - n] + An[i] - m
for i in range(2 * n - 1, n - 1, -1):
	heapq.heappush(latter, -An[i])
	m = heapq.heappop(latter)
	latter_list[2 * n - i] = latter_list[2 * n - i - 1] - An[i] - m
latter_list.reverse()
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, former_list[i] + latter_list[i])
print(ans)


from heapq import *
N = int(input())
a = list(map(int, input().split()))
sumS1 = [0 for i in range(N + 1)]
S1 = a[0:N]
heapify(S1)
sumS1[0] = sum(S1)
for k in range(1, N + 1):
	if S1[0] < a[N + k - 1]:
		sumS1[k] = sumS1[k - 1] + a[N + k - 1] - S1[0]
		heapreplace(S1, a[N + k - 1])
	else:
		sumS1[k] = sumS1[k - 1]
sumS2 = [0 for i in range(N + 1)]
S2 = [-1 * i for i in a[2 * N:3 * N]]
heapify(S2)
sumS2[N] = sum(S2)
for k in range(1, N + 1):
	if S2[0] < -1 * a[2 * N - k]:
		sumS2[N - k] = sumS2[N - k + 1] - a[2 * N - k] - S2[0]
		heapreplace(S2, -1 * a[2 * N - k])
	else:
		sumS2[N - k] = sumS2[N - k + 1]
res = [float('-inf')] * (N + 1)
for i in range(N + 1):
	res[i] = sumS1[i] + sumS2[i]
res.sort()
print(res[N])


from heapq import heappop, heappush, heapify
n = int(input())
a = list(map(int, input().split()))
left = [0] * n
lst = a[:n]
s = sum(lst)
heapify(lst)
for i in range(n):
	heappush(lst, a[n + i])
	x = heappop(lst)
	if i == 0:
		left[0] = s + a[n] - x
	else:
		left[i] = left[i - 1] + a[n + i] - x
left = [s] + left
right = [0] * n
lst = []
for i in range(2 * n, 3 * n):
	lst.append(-a[i])
s = -sum(lst)
heapify(lst)
for i in range(n):
	heappush(lst, -a[2 * n - 1 - i])
	x = -heappop(lst)
	if i == 0:
		right[n - 1] = s + a[2 * n - 1] - x
	else:
		right[n - 1 - i] = right[n - i] + a[2 * n - 1 - i] - x
right += [s]
ans = -float('inf')
for i in range(n + 1):
	ans = max(ans, left[i] - right[i])
print(ans)


import heapq
N = int(input())
(*a,) = map(int, input().split())
(l, r) = ([], [])
for i in range(N):
	heapq.heappush(l, a[i])
	heapq.heappush(r, -a[3 * N - i - 1])
(lsum, rsum) = ([sum(l)], [sum(r)])
for i in range(N):
	heapq.heappush(l, a[i + N])
	lsum.append(lsum[-1] + a[i + N] - heapq.heappop(l))
	heapq.heappush(r, -a[3 * N - i - N - 1])
	rsum.append(rsum[-1] - a[3 * N - i - N - 1] - heapq.heappop(r))
ans = -float('inf')
for i in range(N + 1):
	t = lsum[i] + rsum[N - i]
	if ans < t:
		ans = t
print(ans)