Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Runtime Error):
H, W = map(int, input().split())
def sc(s):
    b = None
    nc = 0
    kk = [0]*len(s)
    for i, c in enumerate(s):
        if c == ".":
            if c == b:
                nc += 1
            else:
                si = i
        else:
            if b == ".":
                for j in range(si, i):
                    kk[j] = i - si
            nc = 0
        b = c
    return kk
d = []
d2 = []
d3 = []
for h in range(H):
    s = input().strip() + "#"
    d.append(s)
    d2.append(sc(s))

for i in range(W):
    s = ""
    for j in range(H):
        s += d[j][i]
    s += "#"
    d3.append(sc(s))
r = 0
for i in range(H):
    for j in range(W):
        r = max(r, d2[i][j] + d3[j][i]-1)
print(r)


Fixed submission:
import sys
L, A, B, M = map(int, input().split())
mod = M
sys.setrecursionlimit(pow(10, 8))

def power(x, y):
    if   y == 0     : return 1
    elif y == 1     : return x % mod
    elif y % 2 == 0 : return power(x, y//2)**2 % mod
    else            : return power(x, (y-1)//2)**2 * x % mod
def mul(a, b):
    return ((a % mod) * (b % mod)) % mod
def modinv(a):
    b, u, v = mod, 1, 0
    while b:
        t = a//b
        a, u = a-t*b, u-t*v
        a, b, u, v = b, a, v, u
    u %= mod
    return u
def div(a, b):
    return a * modinv(b) % mod

def G(n, i):
    if n == 1:
        return 1
    tn = n//2
    return (G(tn, i) * (1 + power(10, tn*i)) %mod + (n%2)*power(10, (n-1)*i)) % mod

def G2(n, i):
    if n ==0 :
        return 0
    if n == 1:
        return power(10, i) % mod
    tn = n//2
    X = G2(tn, i)
    I = power(10, tn*i)
    Y = (X*(I+1)%mod + mul(mul(tn, I), (G(tn+1, i)-1))%mod) %mod
    Y = Y + mul(n%2, mul(n, power(10, n*i)))
    return Y%mod


def f(a, b, n, i):
    if n == 0:
        return 0
    r = power(10, i)
    P = power(r,n)
    #aa = mul(a, div(P-1, r-1))
    aa = mul(a, G(n, i))
    bb2 = mul(b, div(r-n*P + (n-1)*P*r, mul(1-r, 1-r)))
    bb = mul(b, G2(n-1, i))
    #print(n-1, i, div(r-n*P + (n-1)*P*r, mul(1-r, 1-r)), G2(n-1, i))
    #print(bb, bb2)
    return (aa - bb) % mod

sl = A + (L-1) * B
t = 10
k = 0
ts = 0
ks = []
mk = 18
for i in range(mk):
    k = max(min((t-1),sl)-(A-B), 0) // B - ts
    #print(t, min(t, sl) - (A-B), -(-((min(t, sl) - (A-B))//B)))
    #k = -(-(min(t, sl) - (A-B)) // B) - 1 - ts
    ts += k
    ks.append(k)
    t *= 10
ti = 0
ti2 = 0
b = B
R = 0
for i in range(mk):
    i = mk - i
    n = ks[i-1]
    a = sl - ti2*b
    if n:
        R = (R + (f(a, b, n, i))*power(10, ti)) % mod
#        print(a, f(a,b,r,n))
#    print(a, b, r, n, R, ti)

    ti += i*n
    ti2 += n
print(R)
#$print(ks)
Buggy python submission (verdict: Runtime Error):
n,k=map(int,input().split())
xs=[0]+list(map(int,input().split()))
from itertools import accumulate
As=list(accumulate(xs))
r = 0
for i in range(k+1):
    for j in range(i, k+1):
        x = i, j-i, k-j
        m1 = As[i] + As[n] - As[n-j+i]
        ss = sorted(z for z in (xs[:i]+xs[n-j+i+1:]) if z < 0)
        m = m1 - sum(ss[:min(k-j,len(ss))])
#        if m > r:
#            print(x, m, m1)
        r = max(r, m)
print(r)


Fixed submission:
n,k=map(int,input().split())
xs=[0]+list(map(int,input().split()))
from itertools import accumulate
As=list(accumulate(xs))
r = 0
for i in range(k+1):
    for j in range(i, k+1):
        x = i, j-i, k-j
        if j > n:
            continue
        m1 = As[i] + As[n] - As[n-j+i]
        m = m1 - sum(sorted(z for z in (xs[:i]+xs[n-j+i+1:]) if z < 0)[:k-j])
#        if m > r:
#            print(x, m, m1)
        r = max(r, m)
print(r)

Buggy python submission (verdict: Runtime Error):
n,k=map(int,input().split())
xs=[0]+list(map(int,input().split()))
from itertools import accumulate
As=list(accumulate(xs))
r = 0
for i in range(k+1):
    for j in range(i, k+1):
        x = i, j-i, k-j
        m = As[i] + As[n] - As[n-j+i]
        #m = m1 - sum(sorted(z for z in (xs[:i]+xs[n-j+i+1:]) if z < 0)[:k-j])
#        if m > r:
#            print(x, m, m1)
        r = max(r, m)
print(r)


Fixed submission:
n,k=map(int,input().split())
xs=[0]+list(map(int,input().split()))
from itertools import accumulate
As=list(accumulate(xs))
r = 0
for i in range(k+1):
    for j in range(i, k+1):
        x = i, j-i, k-j
        if j > n:
            continue
        m1 = As[i] + As[n] - As[n-j+i]
        m = m1 - sum(sorted(z for z in (xs[:i]+xs[n-j+i+1:]) if z < 0)[:k-j])
#        if m > r:
#            print(x, m, m1)
        r = max(r, m)
print(r)

Buggy python submission (verdict: Runtime Error):
n,k=map(int,input().split())
xs=[0]+list(map(int,input().split()))
from itertools import accumulate
As=list(accumulate(xs))
r = 0
for i in range(k+1):
    for j in range(i, k+1):
        x = i, j-i, k-j
        m1 = As[i] + As[n] - As[n-j+i]
        m = m1 - sum(sorted(z for z in (xs[:i]+xs[n-j+i+1:]) if z < 0)[:k-j])
#        if m > r:
#            print(x, m, m1)
        r = max(r, m)
print(r)


Fixed submission:
n,k=map(int,input().split())
xs=[0]+list(map(int,input().split()))
from itertools import accumulate
As=list(accumulate(xs))
r = 0
for i in range(k+1):
    for j in range(i, k+1):
        x = i, j-i, k-j
        if j > n:
            continue
        m1 = As[i] + As[n] - As[n-j+i]
        m = m1 - sum(sorted(z for z in (xs[:i]+xs[n-j+i+1:]) if z < 0)[:k-j])
#        if m > r:
#            print(x, m, m1)
        r = max(r, m)
print(r)
Buggy python submission (verdict: Runtime Error):
N, = map(int, input().split())
xs = list(map(int, input().split()))
r = 0
for k in range(1, N):
    a = (N-1) % k
    if a <= k:
        a += k
    if a <= k:
        a += k

    for _ in range((N-1-a)//k):
        b = a - k
        n = (N-1-a)//k
        if a <= b:
            a += k
            continue
        if a%(a-b) == 0:
            if a <= (a-b)*n:
                a += k
                continue
    if a <= b or a >= N-1:
        continue
    s1 = a
    s2 = n * (a-b)
    t = xs[s1]
    ps = [(s1,t)]
    for i in range(n):
        s1 += a-b
        t += xs[s2]
        t = max(t,0)
        t += xs[s1]
        ps.append((s2,xs[s2]))
        ps.append((s1,xs[s1]))
        s2 -= a-b
    #print(ps, t)
    r = max(r, t)

print(r)

Fixed submission:
N, = map(int, input().split())
xs = list(map(int, input().split()))
r = 0
for k in range(1, N):
    a = (N-1) % k
    b = a - k
    n = (N-1-a)//k
    if a <= k:
        a += k
    if a <= k:
        a += k

    for _ in range((N-1-a)//k):
        b = a - k
        n = (N-1-a)//k
        if a <= b:
            a += k
            continue
        if a%(a-b) == 0:
            if a <= (a-b)*n:
                a += k
                continue
    if a <= b or a >= N-1:
        continue
    s1 = a
    s2 = n * (a-b)
    t = xs[s1]
    ps = [(s1,t)]
    for i in range(n):
        s1 += a-b
        t += xs[s2]
        t = max(t,0)
        t += xs[s1]
        ps.append((s2,xs[s2]))
        ps.append((s1,xs[s1]))
        s2 -= a-b
    #print(ps, t)
    r = max(r, t)

print(r)

Buggy python submission (verdict: Time Limit Exceeded):
N, = map(int, input().split())
xs = list(map(int, input().split()))
r = 0
for a in range(1, N-1):
    for b in range(1, N-2):
        if a <= b:
            continue
        if (N-1-a)%(a-b):
            continue
        n = (N-1-a)//(a-b)
        if a%(a-b) == 0:
            if a <= (a-b)*n:
                continue
        s = a
        t = xs[a]
        vs = set([a])
        for i in range(n):
            #t = max(0, t)
            s -= b
            t += xs[s]
            vs.add(s)
            s += a
            vs.add(s)
            t += xs[s]
        #print("k:%d, A:%d, B:%d"%(a-b,a,b))
        #print(vs, t)
        r = max(r, t)

print(r)


Fixed submission:
N, = map(int, input().split())
xs = list(map(int, input().split()))
r = 0
for k in range(1, N):
    a = (N-1) % k
    b = a - k
    n = (N-1-a)//k
    if a <= k:
        a += k
    if a <= k:
        a += k

    for _ in range((N-1-a)//k):
        b = a - k
        n = (N-1-a)//k
        if a <= b:
            a += k
            continue
        if a%(a-b) == 0:
            if a <= (a-b)*n:
                a += k
                continue
    if a <= b or a >= N-1:
        continue
    s1 = a
    s2 = n * (a-b)
    t = xs[s1]
    ps = [(s1,t)]
    for i in range(n):
        s1 += a-b
        t += xs[s2]
        t = max(t,0)
        t += xs[s1]
        ps.append((s2,xs[s2]))
        ps.append((s1,xs[s1]))
        s2 -= a-b
    #print(ps, t)
    r = max(r, t)

print(r)
Buggy python submission (verdict: Runtime Error):
import sys
mod = pow(10, 9) + 7
def C(n, r):
    if ( r<0 or r>n ):
        return 0
    r = min(r, n-r)
    return g1[n] * g2[r] * g2[n-r] % mod
NNN = (10**6)
g1 = [1, 1]
g2 = [1, 1]
inverse = [0, 1]
for i in range(2, NNN+1):
    g1.append( ( g1[-1] * i ) % mod )
    inverse.append( ( -inverse[mod % i] * (mod//i) ) % mod )
    g2.append( (g2[-1] * inverse[-1]) % mod )
n,m,k=map(int,input().split())
#n=m=k=2
print(C(n*m,k)*C(k,2)%mod*(n+m)*inverse[3]%mod)

Fixed submission:
N, W = map(int, input().split())
if N >=13:
  print(W)
elif N >=6:
  print(W//2)
else:
  print(0)
Buggy python submission (verdict: Time Limit Exceeded):
N, = map(int, input().split())
import sys
sys.setrecursionlimit(10**6)
d = [set() for _ in range(N+1)]
Cs = [0 for _ in range(N+1)]
for _ in range(N-1):
    u, v, p = map(int, input().split())
    d[u].add((v, p))
    d[v].add((u, p))

def it(v, p):
    for u, c in d[v]:
        if u == p:
            continue
        Cs[u] = int(not Cs[v]) if c%2 else Cs[v]
        it(u, v)
it(1, None)
for i in range(1, N+1):
    print(Cs[i])


Fixed submission:
N, = map(int, input().split())
import sys
sys.setrecursionlimit(10**6)
d = [set() for _ in range(N+1)]
Cs = [0 for _ in range(N+1)]
for _ in range(N-1):
    u, v, p = map(int, input().split())
    d[u].add((v, p))
    d[v].add((u, p))

def it(v, p):
    for u, c in d[v]:
        if u == p:
            continue
        Cs[u] = int(not Cs[v]) if c%2 else Cs[v]
        it(u, v)
it(1, None)
for i in range(1, N+1):
    print(Cs[i])

Buggy python submission (verdict: Runtime Error):
N, = map(int, input().split())
d = [set() for _ in range(N+1)]
l = [set() for _ in range(N+1)]
c = [0 for _ in range(N+1)]
for _ in range(N-1):
    u, v, p = map(int, input().split())
    d[u].add(v)
    d[v].add(u)
    l[min(u,v)] = p

def it(v, p):
    for u in d[v]:
        if u == p:
            continue
        c[u] = int(not c[v]) if l[min(u, v)]%2 else c[v]
        it(u, v)
it(1, None)
for i in range(1, N+1):
    print(c[i])


Fixed submission:
N, = map(int, input().split())
import sys
sys.setrecursionlimit(10**6)
d = [set() for _ in range(N+1)]
Cs = [0 for _ in range(N+1)]
for _ in range(N-1):
    u, v, p = map(int, input().split())
    d[u].add((v, p))
    d[v].add((u, p))

def it(v, p):
    for u, c in d[v]:
        if u == p:
            continue
        Cs[u] = int(not Cs[v]) if c%2 else Cs[v]
        it(u, v)
it(1, None)
for i in range(1, N+1):
    print(Cs[i])

Buggy python submission (verdict: Runtime Error):
N, K = map(int, input().split())
As = [0] + list(map(int, input().split()))
from itertools import accumulate
As = list(accumulate(As))
M = len(As)
d = []
j = 0
r = 0
for i in range(M):
    a = As[i]
    while True:
        if j == M:
            break
        if a + K <= As[j]:
            break
        j += 1
    r += M - j
print(r)


Fixed submission:
N, = map(int, input().split())
import sys
sys.setrecursionlimit(10**6)
d = [set() for _ in range(N+1)]
Cs = [0 for _ in range(N+1)]
for _ in range(N-1):
    u, v, p = map(int, input().split())
    d[u].add((v, p))
    d[v].add((u, p))

def it(v, p):
    for u, c in d[v]:
        if u == p:
            continue
        Cs[u] = int(not Cs[v]) if c%2 else Cs[v]
        it(u, v)
it(1, None)
for i in range(1, N+1):
    print(Cs[i])
Buggy python submission (verdict: Runtime Error):
M, K = map(int, input().split())
if K >= 2**(M+1):
    print(-1)
elif M == 1:
    if K == 0:
        print("1 0")
    else:
        print(-1)
else:
    d = set()
    for i in range(2**(M+1)):
        p = tuple(sorted([i, i^K]))
        if p not in d:
            d.add(p)
    r = []
    while d:
        x,y = d.pop()
        z,w = d.pop()
        r += [x,y,z,w,y,x,w,z]
    print(*r)



Fixed submission:
M, K = map(int, input().split())
if K >= 2**M:
    print(-1)
elif M == 0:
    print(0, 0)
elif M == 1:
    if K == 0:
        print("0 0 1 1")
    else:
        print(-1)
elif K==0:
    r = list(range(2**M))
    r += r[::-1]
    print(*r)
else:
    d = set()
    for i in range(2**M):
        p = tuple(sorted([i, i^K]))
        if p not in d:
            d.add(p)
    r = []
    while d:
        x,y = d.pop()
        z,w = d.pop()
        r += [x,y,z,w,y,x,w,z]
    print(*r)
Buggy python submission (verdict: Runtime Error):
a,g,a_,a__,ac,ga,al=[0]*6+[1]
for i in range(int(input())):
    a__,a_,ac,ga,a,g,al=a_,a,a-ga,g,al,al-ac,(al*4-(ag+ac+ga+a__*3))%(pow(10,9)+7)
print(al)


Fixed submission:
N = int(input().strip())
M = pow(10, 9) + 7
a = 1
g = 1
ag = 0
agg = 0
agt = 0
atg = 0
ac = 0
at = 0
aa = 0
ga = 0

al = 4
nal = 0

for i in range(N-1):
    nal = (al * 4) % M
    nal = (nal + M - (ag + ac + ga + agg + agt + atg) ) % M

    agg = ag
    agt = ag
    atg = at
    ag = a
    aa = a
    at = a
    nac = (a + M- ga) % M
    ga = g
    a = al
    g = (al + M - ac) % M
    ac = nac
    al = nal
print(al)
Buggy python submission (verdict: Runtime Error):
import sys

def ta(x, y, p):
    xc = 0
    yc = 0

    for i in p[x]:
        c = i
        while True:
            if c == x:
                xc += 1
                break
            elif c == y:
                yc += 1
                break
            cs = p[c]
            for j in cs:
                if j != bc:
                    bc = c
                    c = j
                    break
    if xc == yc:
        return True
    else:
        return False


d = {}
p = {}
n, m = input().strip().split(" ")
for i in range(int(n)):
    i += 1
    d[i] = 0
    p[i] = list()

for line in sys.stdin:
    x, y = line.strip().split(" ")
    x, y = int(x), int(y)
    d[x] += 1
    d[y] += 1
    p[x].append(y)
    p[y].append(x)

r = None
fc = 0
fcs = []
for x in d.values():
    if x % 2 != 0:
        r = False
        break
    if x >= 6:
        r = True
    if x >= 4:
        fc += 1
        fcs.append(x)

if r == None:
    if fc >= 3:
        r = True
    elif fc == 2:
        x, y = fcs
        r = ta(x, y, p)
    else:
        r = False
if r:
    print("Yes")
else:
    print("No")



Fixed submission:
import sys

def ta(x, y, p):
    xc = 0
    yc = 0

    for i in p[x]:
        bc = x
        c = i
        while True:
            if c == x:
                xc += 1
                break
            elif c == y:
                yc += 1
                break
            cs = p[c]
            for j in cs:
                if j != bc:
                    bc = c
                    c = j
                    break
    if xc == yc:
        return True
    else:
        return False


d = {}
p = {}
n, m = input().strip().split(" ")
for i in range(int(n)):
    i += 1
    d[i] = 0
    p[i] = list()

for line in sys.stdin:
    x, y = line.strip().split(" ")
    x, y = int(x), int(y)
    d[x] += 1
    d[y] += 1
    p[x].append(y)
    p[y].append(x)

r = None
fc = 0
fcs = []
for x in d:
    y = d[x]
    if y % 2 != 0:
        r = False
        break
    if y >= 6:
        r = True
    if y >= 4:
        fc += 1
        fcs.append(x)

if r == None:
    if fc >= 3:
        r = True
    elif fc == 2:
        x, y = fcs
        r = ta(x, y, p)
    else:
        r = False
if r:
    print("Yes")
else:
    print("No")
Buggy python submission (verdict: Runtime Error):
n = int(input())

M = pow(10, 9) + 7
import sys

dc = {}
al = [0]

rr = [1]


def search(ss, start, end):
    z = al[(start + end)//2]
    nz = al[(start + end)//2+1]
    if z <= ss and ss < nz:
        return (start+end)//2
    elif ss < z:
        return search(ss, start, (start+end)//2)
    else:
        return search(ss, (start+end)//2+1, end)

c = 0
cn = 0
for line in sys.stdin:
    a = int(line)
    if a in dc:
        ss = dc[a]
        if ss != c-1:
            if ss >= al[cn]:
                rr.append((rr[cn]*2)%M)
            else:
                i = search(ss, 0, cn)
                rr.append((rr[cn] + rr[i])%M)
            al.append(c)
            cn += 1
    dc[a] = c
    c += 1
print(rr[cn]%M)


Fixed submission:
import collections
M = pow(10, 9) + 7
input()
s = input().strip()
r=1
for x in collections.Counter(s).values():
    r = (r*(x+1)) %M
print(r-1)
Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())

M = pow(10, 9) + 7
import sys

dc = {}
al = [0]

rr = [1]


def search(ss, start, end):
    z = al[(start + end)//2]
    nz = al[(start + end)//2+1]
    if z <= ss and ss < nz:
        return (start+end)//2
    elif ss < z:
        return search(ss, start, (start+end)//2)
    else:
        return search(ss, (start+end)//2+1, end)

c = 0
cn = 0
for line in sys.stdin:
    a = int(line)
    if a in dc:
        ss = dc[a]
        if ss != c-1:
            if ss >= al[cn]:
                rr.append((rr[cn]*2)%M)
            else:
                i = search(ss, 0, cn)
                rr.append((rr[cn] + rr[i])%M)
            al.append(c)
            cn += 1
    dc[a] = c
    c += 1
print(rr[cn]%M)


Fixed submission:
n = int(input())

M = pow(10, 9) + 7
import sys

dc = {}
al = [0]

rr = [1]


def search(ss, start, end):
    z = al[(start + end)//2]
    nz = al[(start + end)//2+1]
    if z <= ss and ss < nz:
        return (start+end)//2
    elif ss < z:
        return search(ss, start, (start+end)//2)
    else:
        return search(ss, (start+end)//2+1, end)

c = 0
cn = 0
for line in sys.stdin:
    a = int(line)
    if a in dc:
        ss = dc[a]
        if ss != c-1:
            if ss >= al[cn]:
                rr.append((rr[cn]*2)%M)
            else:
                i = search(ss, 0, cn)
                rr.append((rr[cn] + rr[i])%M)
            al.append(c)
            cn += 1
    dc[a] = c
    c += 1
print(rr[cn]%M)
Buggy python submission (verdict: Runtime Error):
N, K = [int(x) for x in input().strip().split(" ")]
hs = [int(x) for x in input().strip().split(" ")]
d = [0] * N

for i in range(N-1):
    i = i+1
    tmp = pow(10, 18)
    for j in range(K):
        j = j + 1
        if i-j < 0:
            continue
        tmp = min(tmp, d[i-j] + abs(hs[i-j] - hs[i]))
    d[i] = tmp
print(d[-1])


Fixed submission:
N, = [int(x) for x in input().strip().split(" ")]
hs = [int(x) for x in input().strip().split(" ")]
d = [0] * N
d[1] = abs(hs[0] - hs[1])

for i in range(N-2):
    i = i+2
    d[i] = min(d[i-1] + abs(hs[i-1] - hs[i]), d[i-2] + abs(hs[i-2] - hs[i]))

print(d[-1])
Buggy python submission (verdict: Time Limit Exceeded):
N, K = [int(x) for x in input().strip().split(" ")]
hs = [int(x) for x in input().strip().split(" ")]
d = [0] * N

for i in range(N-1):
    i = i+1
    tmp = pow(10, 18)
    for j in range(K):
        j = j + 1
        if i-j < 0:
            continue
        tmp = min(tmp, d[i-j] + abs(hs[i-j] - hs[i]))
    d[i] = tmp
print(d[-1])


Fixed submission:
N, K = [int(x) for x in input().strip().split(" ")]
hs = [int(x) for x in input().strip().split(" ")]
d = [0] * N

for i in range(N-1):
    i = i+1
    tmp = pow(10, 18)
    for j in range(K):
        j = j + 1
        if i-j < 0:
            continue
        tmp = min(tmp, d[i-j] + abs(hs[i-j] - hs[i]))
    d[i] = tmp
print(d[-1])
Buggy python submission (verdict: Runtime Error):
s = " " + input().strip()
t = " " + input().strip()
LS, LT = len(s), len(t)
dp = [[0]*LT for _ in range(LS)]
for i in range(1, LS):
    for j in range(1, LT):
        if s[i] == t[j]:
            dp[i][j] = dp[i-1][j-1] + 1
        else:
            dp[i][j] = max(dp[i-1][j], dp[i][j-1])
a, b = (LS-1, LT-1)
r = ""
while a > 0 and b > 0:
    if s[a] == t[b]:
        r+=s[a]
        a, b = a-1, b-1
    elif dp[a+1][b+1] == dp[a][b+1]:
        a -= 1
    else:
        b -= 1

print(r[::-1])


Fixed submission:
s = input().strip()
t = input().strip()
LS, LT = len(s), len(t)
dp = [[0]*(LT+1) for _ in range(LS+1)]
dp2 = [[(0, 0)]*(LT+1) for _ in range(LS+1)]
for i in range(LS):
    for j in range(LT):
        if s[i] == t[j]:
            dp[i+1][j+1] = dp[i][j] + 1
            dp2[i+1][j+1] = (i, j)
        else:
            dp[i+1][j+1] = max(dp[i][j+1], dp[i+1][j])
            if dp[i][j+1] > dp[i+1][j]:
                dp2[i+1][j+1] = (i, j+1)
            else:
                dp2[i+1][j+1] = (i+1, j)
bb = []
a, b = (LS, LT)
while a > 0 and b > 0:
    if s[a-1] == t[b-1]:
        bb.append(s[a-1])
    a, b = dp2[a][b]

print("".join(bb[::-1]))
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
As = list(map(int, input().split()))
d = dict()
for i in range(N):
    for j in range(N-i):
        span = (j,j+i+1)
        if i == 0:
            d[span] = As[j]
        else:
            d[span] = max(As[j]-d[(j+1,j+i+1)], As[j+i]-d[(j,j+i)])
print(d[span])


Fixed submission:
N = int(input())
As = list(map(int, input().split()))
d = [0]*(N**2)
for i in range(N):
    for j in range(N-i):
        span = i*N+j
        if i == 0:
            d[span] = As[j]
        else:
            d[span] = max(As[j]-d[span-N+1], As[j+i]-d[span-N])
print(d[span])
Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
As = list(map(int, input().split()))
o = [0]*(N**2)
INF = 10**19
from itertools import accumulate
aa = [0] + list(accumulate(As))

for i in range(1, N+1):
    for j in range(N-i+1):
        span = (i-1)*N+j
        # 長さi, 開始位置jの合成コスト+構成要素の和
        if i == 1:
            o[span] = As[j]
            continue
        C = INF
        for k in range(1, i):
            # 長さ,開始位置=(k,j)と(i-k,j+k)
            span1, span2 = (k-1)*N+j, (i-k-1)*N+j+k
            C = min(C, o[span1]+o[span2])
        o[span] = C + aa[(j+i-1)+1] - aa[(j-1)+1]
print(o[span]-aa[-1])

Fixed submission:
N = int(input())
As = list(map(int, input().split()))
ma = sum(As)
o = dict()
INF = 10**19
from itertools import accumulate
aa = [0] + list(accumulate(As))

for i in range(N):
    for j in range(N-i):
        span = i*N+j
        # 長さi+1, 開始位置jの合成コスト+構成要素の和
        if i == 0:
            o[span] = As[j]
            continue
        C = INF
#        print(i,j,o)
        for k in range(i):
            # 長さk+1とi+1-(k+1)=i-kに分割
#            print(i,j,k*N+j, (i-k-1)*N+j+k, o)
            C = min(C, o[k*N+j]+o[(i-k-1)*N+j+k+1])
#        o[span] = C + sum(As[j:j+i+1])
        o[span] = C + aa[j+i+1] - aa[j]

print(o[span]-ma)