qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import sys
input = sys.stdin.readline


n = int(input())
L = [int(input()) for _ in range(n)]
L.sort()
n_2 =n // 2

ans = 0
if n % 2 == 1:
    ans = 2*sum(L[n_2+1:])-2*sum(L[:n_2-1])-L[n_2-1]-L[n_2]
else:
    ans = 2*sum(L[n_2+1:])-2*sum(L[:n_2-1])+L[n_2]-L[n_2-1]
    

print(ans)

Fixed code:
import sys
input = sys.stdin.readline


n = int(input())
L = [int(input()) for _ in range(n)]
L.sort()
n_2 =n // 2

ans = 0
if n % 2 == 1:
    ans = 2*sum(L[n_2+1:])-2*sum(L[:n_2-1])-L[n_2-1]-L[n_2]
    ans_2 = 2*sum(L[n_2+2:])-2*sum(L[:n_2])+L[n_2+1]+L[n_2]
    ans = max(ans,ans_2)
else:
    ans = 2*sum(L[n_2+1:])-2*sum(L[:n_2-1])+L[n_2]-L[n_2-1]
    

print(ans)
Buggy code:
def tenka18beg_c():
    N = int(input())
    A = [int(input()) for _ in range(N)]
    A_desc = sorted(A, reverse=True)

    if N % 2 == 1:
        tot1, tot2 = 0, 0
        for i, a in enumerate(A_desc):
            if i < N//2 - 1:
                tot1 += 2*a
                tot2 += 2*a
            elif i == N//2 - 1:
                tot1 += a
                tot2 += 2*a
            elif i == N//2:
                tot1 += a
                tot2 -= a
            elif i == N//2 + 1:
                tot1 -= 2*a
                tot2 -= a
            elif N//2 + 1 < i:
                tot1 -= 2*a
                tot2 -= 2*a
        ans = max(ans, max(tot1, tot2))
    else:
        tot = 0
        for i, a in enumerate(A_desc):
            if i < N//2 - 1:
                tot += 2*a
            elif i == N//2 - 1:
                tot += a
            elif i == N//2:
                tot -= a
            elif N//2 < i:
                tot -= 2*a
        ans = tot
    print(ans)

tenka18beg_c()

Fixed code:
def tenka18beg_c():
    N = int(input())
    A = [int(input()) for _ in range(N)]
    A_desc = sorted(A, reverse=True)

    if N % 2 == 1:
        tot1, tot2 = 0, 0
        for i, a in enumerate(A_desc):
            if i < N//2 - 1:
                tot1 += 2*a
                tot2 += 2*a
            elif i == N//2 - 1:
                tot1 += a
                tot2 += 2*a
            elif i == N//2:
                tot1 += a
                tot2 -= a
            elif i == N//2 + 1:
                tot1 -= 2*a
                tot2 -= a
            elif N//2 + 1 < i:
                tot1 -= 2*a
                tot2 -= 2*a
        ans = max(tot1, tot2)
    else:
        tot = 0
        for i, a in enumerate(A_desc):
            if i < N//2 - 1:
                tot += 2*a
            elif i == N//2 - 1:
                tot += a
            elif i == N//2:
                tot -= a
            elif N//2 < i:
                tot -= 2*a
        ans = tot
    print(ans)

tenka18beg_c()
Buggy code:
import sys
sys.setrecursionlimit(10 ** 7)
input = sys.stdin.readline

n = int(input())
a = list(int(input()) for i in range(n))

a.sort()
if n%2==0:
    start = n//2-1
    left = 0
    right = n-1
    ans = abs(a[right]- a[start])
    while start != left:
        ans+=abs(a[left]-a[right])
        right -= 1
        ans+=abs(a[right]-a[left])
        left += 1

    print(ans)

if n%2==1:
    start = n//2
    left = 0
    right = n-1
    
    ans0 = abs(a[right]- a[start])
    while True:
        ans0+=abs(a[left]-a[right])
        right -= 1
        if start == right: break
        ans0+=abs(a[right]-a[left])
        left += 1
        
    ans1 = abs(a[left]- a[start])
    while True:
        ans1+=abs(a[right]-a[left])
        right -= 1
        if start == right: break
        ans1+=abs(a[left]-a[right])
        left += 1

    ans = max(ans0,ans1)
    print(ans)



Fixed code:
import sys
sys.setrecursionlimit(10 ** 7)
input = sys.stdin.readline

n = int(input())
a = list(int(input()) for i in range(n))

a.sort()
if n%2==0:
    start = n//2-1
    left = 0
    right = n-1
    ans0 = abs(a[right]- a[start])
    while start != left:
        ans0+=abs(a[left]-a[right])
        right -= 1
        ans0+=abs(a[right]-a[left])
        left += 1

    start = n//2
    left = 0
    right = n-1
    ans1 = abs(a[left]- a[start])
    while start != right:
        ans1+=abs(a[right]-a[left])
        left += 1
        ans1+=abs(a[left]-a[right])
        right -= 1

    ans = max(ans0,ans1)
    print(ans)

if n%2==1:
    start = n//2
    left = 0
    right = n-1
    ans0 = abs(a[right]- a[start])
    while True:
        ans0+=abs(a[left]-a[right])
        right -= 1
        if start == right: break
        ans0+=abs(a[right]-a[left])
        left += 1


    left = 0
    right = n-1
    ans1 = abs(a[left]- a[start])
    while True:
        ans1+=abs(a[right]-a[left])
        left += 1
        if start == left: break
        ans1+=abs(a[left]-a[right])
        right -= 1

    ans = max(ans0,ans1)
    print(ans)
Buggy code:
import sys
input = sys.stdin.readline
n = innt(input())
chk = []
for i in range(n):
  a = input()
  chk.append(a)
chk.sort()
if n%2 == 0:
  l = [i*2 for i in chk[:n//2]]
  r = [i*2 for i in chk[n//2:]]
  print(sum(r)-sum(l)+chk[n//2-1]-chk[n//2])
else:
  l = [i*2 for i in chk[:(n-1)//2]]
  r = [i*2 for i in chk[(n-1)//2+1:]]
  print(max(sum(r)-sum(l)+chk[(n-1)//2-1]-chk[(n-1)//2]),(sum(r)-sum(l)+chk[(n-1)//2]-chk[(n-1)//2+1]))

Fixed code:
import sys
input = sys.stdin.readline
n = int(input())
chk = []
for i in range(n):
  a = int(input())
  chk.append(a)
chk.sort()
if n%2 == 0:
  l = [i*2 for i in chk[:n//2]]
  r = [i*2 for i in chk[n//2:]]
  print(sum(r)-sum(l)+chk[n//2-1]-chk[n//2])
else:
  l = [i*2 for i in chk[:(n-1)//2]]
  r = [i*2 for i in chk[(n-1)//2+1:]]
  p = sum(r)-sum(l)+chk[(n-1)//2-1]-chk[(n-1)//2]
  q = sum(r)-sum(l)+chk[(n-1)//2]-chk[(n-1)//2+1]
  print(max(p,q))
Buggy code:
N = int(input())
A = sorted([int(input()) for _ in range(N)], reverse=True)
result = 0
if N % 2 == 0:
    k = [2]*((N-2)//2)
    k += [1]
    k += [-1]
    a = [-2]*((N-2)//2)
    k = k+a
else:
    k = [2]*(N//2-1)
    k += [1]
    k += [1]
    a = [-2]*(N//2)
    k = k+a
for a, keisu in zip(A, k):
    result += a*keisu
print(result)

Fixed code:
N = int(input())
A = sorted([int(input()) for _ in range(N)], reverse=True)
result = 0
if N % 2 == 0:
    k = [2]*((N-2)//2)
    k += [1]
    k += [-1]
    a = [-2]*((N-2)//2)
    k = k+a
    for a, keisu in zip(A, k):
        result += a*keisu
else:
    k = [2]*(N//2-1)
    k += [1]
    k += [1]
    a = [-2]*(N//2)
    k = k+a
    result1 = 0
    for a, keisu in zip(A, k):
        result1 += a*keisu
    k = [2]*(N//2)
    k += [-1]
    k += [-1]
    a = [-2]*(N//2-1)
    k = k+a
    result2 = 0
    for a, keisu in zip(A, k):
        result2 += a*keisu
    result = max(result1, result2)
print(result)
Buggy code:
import sys
stdin = sys.stdin
sys.setrecursionlimit(10**6)
ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
nn = lambda: list(stdin.readline().split())
ns = lambda: stdin.readline().rstrip()

n = ni()
a = []

for i in range(n):
    a.append(ni())

a.sort()
k = n//2

if n%2 == 0:
    ans = (sum(a[t+1:])-sum(a[:t-1]))*2+a[t]-a[t-1]
    print(ans)
else:
    x = 2*(sum(a[t+1:])-sum(a[:t-1])) - a[t-1] - a[t]
    y = 2*(sum(a[t+2:])-sum(a[:t])) + a[t+1] + a[t]
    print(max(x,y))

Fixed code:
import sys
stdin = sys.stdin
sys.setrecursionlimit(10**6)
ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
nn = lambda: list(stdin.readline().split())
ns = lambda: stdin.readline().rstrip()

n = ni()
a = []

for i in range(n):
    a.append(ni())

a.sort()
t = n//2

if n%2 == 0:
    ans = (sum(a[t+1:])-sum(a[:t-1]))*2+a[t]-a[t-1]
    print(ans)
else:
    x = 2*(sum(a[t+1:])-sum(a[:t-1])) - a[t-1] - a[t]
    y = 2*(sum(a[t+2:])-sum(a[:t])) + a[t+1] + a[t]
    print(max(x,y))
Buggy code:
N = int(input())
L = [int(input()) for _ in range(N)]


if N % 2 == 1:
    L = sorted(L, reverse=True)
    minority = N//2
    majority = N - minority
    A = sum(L[:minority])*2 - sum(L[minority:])*2+sum(L[minority:minority+2])
    B = sum(L[:majority])*2 - sum(L[majority:])*2 - sum(L[majority-2:majority])
    ans = max(A, B)
else:
    L = sorted(L)
    C = sum(L[:N//2])*2 - sum(L[N//2:])*2 + L[N//2]-L[N//2-1]
    D = C
    ans = max(C, D)
print(ans)


Fixed code:
N = int(input())
L = [int(input()) for _ in range(N)]


if N % 2 == 1:
    L = sorted(L, reverse=True)
    minority = N//2
    majority = N - minority
    A = sum(L[:minority])*2 - sum(L[minority:])*2+sum(L[minority:minority+2])
    B = sum(L[:majority])*2 - sum(L[majority:])*2 - sum(L[majority-2:majority])
    ans = max(A, B)
else:
    L = sorted(L)
    C = sum(L[:N//2])*2 - sum(L[N//2:])*2 + L[N//2]-L[N//2-1]
    D = -C
    ans = max(C, D)
    pass
print(ans)
Buggy code:
from sys import stdin
N = int(stdin.readline().rstrip())
A = []
for i in range(N):
    A.append(int(input()))

A.sort()

ans = 0
if N % 2 == 0:
    tmp = [-1,1] + [2]*((N-2)//2) + [-2]*((N-2)//2)
    for i,j in zip(sorted(tmp),A):
        ans += (i*j)
    print(ans)
else:
    tmp = [-1,1] + [2]*((N-1)//2) + [-2]*((N-2)//2)
    for i,j in zip(sorted(tmp),A):
        ans += (i*j)
    print(ans)

Fixed code:
from sys import stdin
N = int(stdin.readline().rstrip())
A = []
for i in range(N):
    A.append(int(input()))

A.sort()


if N % 2 != 0:
    ans1 = 0
    tmp = [-1,-1] + [2]*((N-1)//2) + [-2]*((N-2)//2)
    for i,j in zip(sorted(tmp),A):
        ans1 += (i*j)
    
    ans2 = 0
    tmp = [1,1] + [2]*((N-2)//2) + [-2]*((N-1)//2)
    for i,j in zip(sorted(tmp),A):
        ans2 += (i*j)
    print(max(ans1,ans2))
else:
    ans = 0
    tmp = [-1,1] + [2]*((N-2)//2) + [-2]*((N-2)//2)
    for i,j in zip(sorted(tmp),A):
        ans += (i*j)
    print(ans)
Buggy code:
def main():
    N, *A = map(int, open(0).read().split())
    A.sort()
    if N % 2 == 0:
        s, l = A[:N//2], A[N//2:]
        ans = 2*(sum(l) - sum(s))
        ans += s[-1] - l[0]
        print(ans)
        return

    sep1 = (N + 1)//2
    s1, l1 = A[:sep1], A[sep1:]
    # print(s1, l1)
    ans1 = 2*abs(sum(l1) - sum(s1))
    ans1 += s1[-1] + s1[-2]

    sep2 = sep1 - 1
    s2, l2 = A[:sep2], A[sep2:]
    # print(s2, l2)
    ans2 = 2*abs(sum(l2) - sum(s2))
    ans2 -= l2[0] + l2[1]

    print(ans1, ans2)

if __name__ == '__main__':
    main()


Fixed code:
def main():
    N, *A = map(int, open(0).read().split())
    A.sort()
    if N % 2 == 0:
        s, l = A[:N//2], A[N//2:]
        ans = 2*(sum(l) - sum(s))
        ans += s[-1] - l[0]
        print(ans)
        return

    sep1 = (N + 1)//2
    s1, l1 = A[:sep1], A[sep1:]
    # print(s1, l1)
    ans1 = 2*(sum(l1) - sum(s1))
    ans1 += s1[-1] + s1[-2]

    sep2 = sep1 - 1
    s2, l2 = A[:sep2], A[sep2:]
    # print(s2, l2)
    ans2 = 2*(sum(l2) - sum(s2))
    ans2 -= l2[0] + l2[1]

    print(max(ans1, ans2))

if __name__ == '__main__':
    main()
Buggy code:
n = int(input())
lst = [int(input()) for _ in range(n)]
lst.sort()
print(lst)
if n%2==0:
    lower = lst[:n//2]
    upper = lst[n//2:]
    x = 2*sum(upper) - upper[0]
    y = 2*sum(lower) - lower[-1]
    print(x-y)
else:
    lower = lst[:n//2]
    upper = lst[n//2+1:]
    mid = lst[n//2]
    x = 2*sum(upper) - 2*sum(lower) - mid + lower[-1]
    y = 2*sum(upper) - 2*sum(lower) + mid - upper[0]
    print(max(x,y))

Fixed code:
n = int(input())
lst = [int(input()) for _ in range(n)]
lst.sort()
if n%2==0:
    lower = lst[:n//2]
    upper = lst[n//2:]
    x = 2*sum(upper) - upper[0]
    y = 2*sum(lower) - lower[-1]
    print(x-y)
else:
    lower = lst[:n//2]
    upper = lst[n//2+1:]
    mid = lst[n//2]
    x = 2*sum(upper) - 2*sum(lower) - mid + lower[-1]
    y = 2*sum(upper) - 2*sum(lower) + mid - upper[0]
    print(max(x,y))
Buggy code:
import sys
input = sys.stdin.readline
n = int(input())
a = [int(input()) for i in range(n)]
a.sort()
b = []
c = []
for i in range(n):
  if i%2:
    b.append(a[i//2])
    c.append(a[i//2+(n+1)//2])
  else:
    b.append(a[i//2+n//2])
    c.append(a[i//2])

ansb = 0
ansc = 0
for i in range(n-1):
  ansb += abs(b[i+1]-b[i])
  ansc += abs(c[i+1]-c[i])
print(max(ansb,ansc))

Fixed code:
import sys
input = sys.stdin.readline
n = int(input())
a = [int(input()) for i in range(n)]
a.sort()
b = []
c = []
for i in range(n):
  if i%2:
    b.append(a[i//2])
    c.append(a[i//2+(n+1)//2])
  else:
    b.append(a[i//2+n//2])
    c.append(a[i//2])
if n>=3 and n%2:
  b[-1],b[2] = b[2],b[-1]
  c[0],c[-3] = c[-3],c[0]
ansb = 0
ansc = 0
for i in range(n-1):
  ansb += abs(b[i+1]-b[i])
  ansc += abs(c[i+1]-c[i])
print(max(ansb,ansc))
Buggy code:
n=int(input())
a=[int(input()) for _ in range(n)]
a.sort()
if n==2:
  x=a[1]-a[0]
elif n%2==0:
  x=(sum(a[n//2+1:])-sum(a[:n//2-1]))*2
  x-=a[n//2-1]
  x+=a[n//2]
elif n==3:
  x=a[2]*2-a[0]-a[1]
  y=a[2]+a[1]-a[0]*2
  x=max(x,y)
else:
  x=(sum(a[n//2+2:])-sum(a[:n//2]))*2
  x+=a[n//2]+a[n//2+1]
  y=(sum(a[n//2+1:])-sum(a[:n//2-1]))*2
  y-=a[n//2]-a[n//2-1]
  x=max(x,y)
print(x)

Fixed code:
n=int(input())
a=[int(input()) for _ in range(n)]
a.sort()
if n==2:
  x=a[1]-a[0]
elif n%2==0:
  x=(sum(a[n//2+1:])-sum(a[:n//2-1]))*2
  x-=a[n//2-1]
  x+=a[n//2]
elif n==3:
  x=a[2]*2-a[0]-a[1]
  y=a[2]+a[1]-a[0]*2
  x=max(x,y)
else:
  x=(sum(a[n//2+2:])-sum(a[:n//2]))*2
  x+=a[n//2]+a[n//2+1]
  y=(sum(a[n//2+1:])-sum(a[:n//2-1]))*2
  y-=a[n//2]+a[n//2-1]
  x=max(x,y)
print(x)
Buggy code:
n=int(input())
a=[0]*n
for  i in range(n):
    a[i]=int(input())
a.sort(reverse=True)
ans=0
aupper=a[:n//2]
adowner=a[n//2:]
if len(a)==2:print(a[0]-a[1])
elif len(a)==3:
    print(sum(a[:n-1])-a[n-1]*2)
elif n%2==1:
    ans1=0;ans2=0
    for i in range(n//2):
        ans1+=aupper[i]*2-(adowner[i]+adowner[i+1])
    ans1+=(adowner[1]-adowner[-1])
    a=a[::-1]
    adowner=a[:n//2]
    aupper=a[n//2:]
    for i in range(n//2):
        ans2+=aupper[i]+aupper[i+1]-adowner[i]*2
    print(ans1,ans2)
else:
    ans=0
    for i in range(n//2):
        if i!=n//2-1:
            ans+=aupper[i]*2-(adowner[i]+adowner[i+1])
        else:
            ans+=aupper[i]-adowner[i]
    print(ans)

Fixed code:
n=int(input())
a=[0]*n
for  i in range(n):
    a[i]=int(input())
a.sort(reverse=True)
ans=0
aupper=a[:n//2]
adowner=a[n//2:]
if len(a)==2:print(a[0]-a[1])
elif len(a)==3:
    print(max(sum(a[:n-1])-a[n-1]*2,a[0]*2-sum(a[1:])))
elif n%2==1:
    ans1=0;ans2=0
    for i in range(n//2):
        ans1+=aupper[i]*2-(adowner[i]+adowner[i+1])
    ans1+=(adowner[1]-adowner[-1])
    a=a[::-1]
    adowner=a[:n//2]
    aupper=a[n//2:]
    for i in range(n//2):
        ans2+=aupper[i]+aupper[i+1]-adowner[i]*2
    ans2+=aupper[-1]-aupper[1]
    print(max(ans1,ans2))
else:
    ans=0
    for i in range(n//2):
        if i!=n//2-1:
            ans+=aupper[i]*2-(adowner[i]+adowner[i+1])
        else:
            ans+=aupper[i]-adowner[i]
    print(ans)
Buggy code:
import sys
input = sys.stdin.readline

N = int(input())
A = [int(input()) for _ in range(N)]

ans = 0
A.sort()

tmp1 = A[0]
tmp2 = A[0]

count = 1
flag = True
i = 1
j = 1
while True:
    if flag:
        if tmp1 < tmp2:
            tmp1, tmp2 = tmp2, tmp1
    else:
        if tmp1 > tmp2:
            tmp1, tmp2 = tmp2, tmp1


    if count == N:
        break
    if flag:
        ans += abs(tmp1 - A[-i])
        tmp1 = A[-i]
        i += 1
    else:
        ans += abs(tmp1 - A[j])
        tmp1 = A[j]
        j += 1

    count += 1

    if count == N:
        break
    if flag:
        ans += abs(tmp2 - A[-i])
        tmp2 = A[-i]
        i += 1
    else:
        ans += abs(tmp2 - A[j])
        tmp2 = A[j]
        j += 1
    
    count += 1

    flag = not flag
    # print ('A', ans)

# print (i, j)
print (ans)


Fixed code:
import sys
input = sys.stdin.readline

N = int(input())
A = [int(input()) for _ in range(N)]


A.sort()

def calc(A):
    ans = 0
    tmp1 = A[0]
    tmp2 = A[0]

    count = 1
    flag = True
    i = 1
    j = 1
    while True:
        if flag:
            if tmp1 > tmp2:
                tmp1, tmp2 = tmp2, tmp1
        else:
            if tmp1 < tmp2:
                tmp1, tmp2 = tmp2, tmp1


        if count == N:
            break
        if flag:
            ans += abs(tmp1 - A[-i])
            tmp1 = A[-i]
            i += 1
        else:
            ans += abs(tmp1 - A[j])
            tmp1 = A[j]
            j += 1

        count += 1

        if count == N:
            break
        if flag:
            ans += abs(tmp2 - A[-i])
            tmp2 = A[-i]
            i += 1
        else:
            ans += abs(tmp2 - A[j])
            tmp2 = A[j]
            j += 1
        
        count += 1

        flag = not flag
        # print ('A', ans)
    return ans

# print (i, j)
print (max(calc(A[::-1]), calc(A)))
Buggy code:
import sys
from collections import deque
read = sys.stdin.read

N, *A = map(int, read().split())

A.sort()
A = deque(A)
a = deque()
answer = 0
side = True
a.append(A.popleft())

while A:
    if side:
        a.append(A.pop())
        if A:
            a.appendleft(A.pop())
        side = False
    else:
        a.appendleft(A.popleft())
        if A:
            a.append(A.popleft())
        side = True

a = list(a)
for i, j in zip(a, a[1:]):
    answer += abs(i - j)

print(answer)

Fixed code:
import sys
from collections import deque
read = sys.stdin.read

N, *A = map(int, read().split())

A.sort()
A = deque(A)
a = deque()
side = True
a.append(A.popleft())

while A:
    if side:
        a.append(A.pop())
        if A:
            a.appendleft(A.pop())
        side = False
    else:
        a.append(A.popleft())
        if A:
            a.appendleft(A.popleft())
        side = True

if side:
    tmp = a.popleft()
else:
    tmp = a.pop()

if abs(tmp - a[0]) <= abs(tmp - a[-1]):
    a.append(tmp)
else:
    a.appendleft(tmp)

if not side:
    tmp = a.popleft()
else:
    tmp = a.pop()

if abs(tmp - a[0]) <= abs(tmp - a[-1]):
    a.append(tmp)
else:
    a.appendleft(tmp)

answer = 0
a = list(a)
for i, j in zip(a, a[1:]):
    answer += abs(i - j)

print(answer)
Buggy code:
#!/usr/bin/env python3
import sys, math, itertools, heapq, collections, bisect
input = lambda: sys.stdin.buffer.readline().rstrip().decode('utf-8')
sys.setrecursionlimit(10**8)
inf = float('inf')
ans = 0
count = 0
n=int(input())
A=[int(input()) for i in range(n)]
A.sort()
if n%2==1:
    if A[n//2]-A[n//2-1]<=A[n//2+1]-A[n//2]:
        A.insert(0,A[n//2+1])
    else:
        A.append(A[n//2])
    n+=1
tmp=A[n//2]
for i in range(n//2):
    ans+=abs(tmp-A[i+n//2])
    tmp = A[i+n//2]
    print(tmp)
    ans+=abs(tmp-A[i])
    tmp=A[i]
    print(tmp)
print(ans)

# print(A)

Fixed code:
#!/usr/bin/env python3
import sys, math, itertools, heapq, collections, bisect
input = lambda: sys.stdin.buffer.readline().rstrip().decode('utf-8')
sys.setrecursionlimit(10**8)
inf = float('inf')
ans = 0
count = 0
n=int(input())
A=[int(input()) for i in range(n)]
A.sort()
if n%2==1:
    if A[n//2]-A[n//2-1]<=A[n//2+1]-A[n//2]:
        A.insert(0,A[n//2+1])
    else:
        A.append(A[n//2])
    n+=1
tmp=A[n//2]
for i in range(n//2):
    ans+=abs(tmp-A[i+n//2])
    tmp = A[i+n//2]
    # print(tmp)
    ans+=abs(tmp-A[i])
    tmp=A[i]
    # print(tmp)
print(ans)

# print(A)
Buggy code:
N=int(input())
A=sorted([int(input()) for i in range(N)])
#A=[i for i in range(50)]
#N=len(A)
value=0
B,C=A[0],A[0]
i=1
z=0

while N-1>z:

    if z%4==0:
        value+=A[-i]-B
        B=A[-i]
    if z%4==1:
        value+=A[-i-1]-C
        C=A[-i-1]
    if z%4==2:
        value+=B-A[i]
        B=A[i]
    if z%4==3:
        value+=C-A[i+1]
        C=A[i+1]
        i+=2
    #print(B,C,i,z)
    z+=1
value1=value
value=0
B,C=A[-1],A[-1]
i=0
z=0
while N-1>z:

    if z%4==0:
        value+=B-A[i]
        B=A[i]

    if z%4==1:
        value+=C-A[i+1]
        C=A[i+1]

    if z%4==2:
        value+=A[-i-2]-B
        B=A[-i-1]
    if z%4==3:
        value+=A[-i-3]-C
        C=A[-i-2]
        i+=2
    #print(B,C,i,z,value)
    z+=1
value2=value
print(max(value1,value2))


Fixed code:
N=int(input())
A=sorted([int(input()) for i in range(N)])
#A=[i for i in range(50)]
#N=len(A)
value=0
B,C=A[0],A[0]
i=1
z=0

while N-1>z:

    if z%4==0:
        value+=A[-i]-B
        B=A[-i]
    if z%4==1:
        value+=A[-i-1]-C
        C=A[-i-1]
    if z%4==2:
        value+=B-A[i]
        B=A[i]
    if z%4==3:
        value+=C-A[i+1]
        C=A[i+1]
        i+=2
    #print(B,C,i,z)
    z+=1
value1=value
value=0
B,C=A[-1],A[-1]
i=0
z=0
while N-1>z:

    if z%4==0:
        value+=B-A[i]
        B=A[i]

    if z%4==1:
        value+=C-A[i+1]
        C=A[i+1]

    if z%4==2:
        value+=A[-i-2]-B
        B=A[-i-2]
    if z%4==3:
        value+=A[-i-3]-C
        C=A[-i-3]
        i+=2
    #print(B,C,i,z,value)
    z+=1
value2=value
print(max(value1,value2))
Buggy code:
N = int(input())
A = []

for i in range(N):
    A.append(int(input()))

A = sorted(A)

B = [0] * N
m = int(N/2)
B[m] = A[0]

si = 1
bi = 0
ci = 1

for i in range(1, N):
    si *= -1
    ii = int(i/2 + 0.5)

    if i % 4 == 1 or i % 4 == 2:
        B[m+si*ii] = A[N-bi-1]
        bi += 1
    if i % 4 == 3 or i % 4 == 0:
        B[m+si*ii] = A[ci]
        ci += 1

C = [0] * N
m = int(N/2)
B[m] = A[0]

si = 1
bi = 0
ci = 1

for i in range(1, N):
    si *= -1
    ii = int(i/2 + 0.5)

    if i % 4 == 1 or i % 4 == 2:
        C[m+si*ii] = A[ci]
        ci += 1
    if i % 4 == 3 or i % 4 == 0:
        C[m+si*ii] = A[N-bi-1]
        bi += 1

cntB = 0
cntC = 0
for i in range(N-1):
    cntB += abs(B[i] - B[i+1])
    cntC += abs(C[i] - C[i+1])


print(max(cntB, cntC))


Fixed code:
N = int(input())
A = []

for i in range(N):
    A.append(int(input()))

A = sorted(A)

B = [0] * N
m = int(N/2)
B[m] = A[0]

si = 1
bi = 0
ci = 1

for i in range(1, N):
    si *= -1
    ii = int(i/2 + 0.5)

    if i % 4 == 1 or i % 4 == 2:
        B[m+si*ii] = A[N-bi-1]
        bi += 1
    if i % 4 == 3 or i % 4 == 0:
        B[m+si*ii] = A[ci]
        ci += 1

C = [0] * N
m = int(N/2)
C[m] = A[N-1]

si = 1
bi = 1
ci = 0

for i in range(1, N):
    si *= -1
    ii = int(i/2 + 0.5)

    if i % 4 == 1 or i % 4 == 2:
        C[m+si*ii] = A[ci]
        ci += 1
    if i % 4 == 3 or i % 4 == 0:
        C[m+si*ii] = A[N-bi-1]
        bi += 1

cntB = 0
cntC = 0
for i in range(N-1):
    cntB += abs(B[i] - B[i+1])
    cntC += abs(C[i] - C[i+1])


print(max(cntB, cntC))
Buggy code:
N=int(input())

A=[int(input()) for i in range(N)]

A.sort()

ansl=A[0]
ansr=A[-1]
l=1
r=-2
n=[0]*4
ansn=abs(A[0]-A[-1])
for i in range(N-2):
    n[0]=abs(A[l]-ansl)
    n[1]=abs(A[l]-ansr)
    n[2]=abs(A[r]-ansl)
    n[3]=abs(A[r]-ansr)
    if n[0]==max(n):
        ansn+=n[0]
        ansl=A[l]
        l+=1
    elif n[1]==max(n):
        ansn+=n[1]
        ansl=A[l]
        l+=1
    elif n[2]==max(n):
        ansn+=n[2]
        ansr=A[r]
        r-=1
    elif n[3]==max(n):
        ansn+=n[3]
        ansr=A[r]
        r-=1

print(ansn)

Fixed code:
N=int(input())

A=[int(input()) for i in range(N)]

A.sort()

ansl=A[0]
ansr=A[-1]
l=1
r=-2
n=[0]*4
ansn=abs(A[0]-A[-1])
for i in range(N-2):
    n[0]=abs(A[l]-ansl)
    n[1]=abs(A[l]-ansr)
    n[2]=abs(A[r]-ansl)
    n[3]=abs(A[r]-ansr)
    if n[0]==max(n):
        ansn+=n[0]
        ansl=A[l]
        l+=1
    elif n[1]==max(n):
        ansn+=n[1]
        ansr=A[l]
        l+=1
    elif n[2]==max(n):
        ansn+=n[2]
        ansl=A[r]
        r-=1
    elif n[3]==max(n):
        ansn+=n[3]
        ansr=A[r]
        r-=1

print(ansn)
Buggy code:
n=int(input())
l=[]
for i in range(n):
  l.append(int(input()))
l1=sorted(l)
if n%2==0:
  k=n//2
  sum=0
  for i in range(0,k):
    sum-=2*l1[i]
  for i in range(k,n):
    sum+=2*l1[i]
  sum-=l1[k]
  sum+=l1[k-1]
else:
  k=n//2
  sum=0
  for i in range(k,n):
    sum+=2*l1[i]
  for i in range(k):
    sum-=2*l1[i]
  sum-=l1[0]
  sum-=l1[1]
print(sum)

Fixed code:
n=int(input())
l=[]
for i in range(n):
  l.append(int(input()))
l1=sorted(l)
if n%2==0:
  k=n//2
  sum=0
  for i in range(0,k):
    sum-=2*l1[i]
  for i in range(k,n):
    sum+=2*l1[i]
  sum-=l1[k]
  sum+=l1[k-1]
  print(sum)
else:
  k=n//2
  sum=0
  for i in range(k,n):
    sum+=2*l1[i]
  for i in range(k):
    sum-=2*l1[i]
  sum-=l1[k]
  sum-=l1[k+1]
  sum1=0
  for i in range(k+1,n):
    sum1+=2*l1[i]
  for i in range(k+1):
    sum1-=2*l1[i]
  sum1+=l1[k]
  sum1+=l1[k-1]
  print(max(sum,sum1))