Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    N = int(input())
    A = tuple(map(int, input().split()))

    from itertools import accumulate
    CA = list(accumulate(A))

    mindiff = CA[-1]

    for c in range(1,N-2):
        # left side
        p = 0
        q = CA[-1]
        left = 0
        # for i in range(0, c):
        while True:
            pi = CA[left]
            qi = CA[c] - CA[left]
            if abs(pi- qi) >= abs(p - q):
                break
            p = pi; q = qi
            left += 1

        # right side
        r = 0
        s = CA[-1]
        right = c+1
        # for i in range(c+1, N):
        while True:
            ri = CA[right] - CA[c]
            si = CA[-1] - CA[right]
            if abs(ri- si) >= abs(r - s):
                break
            r = ri; s = si
            right += 1
    
        mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
    return mindiff
print(solve())

Fixed submission:
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
left = 0
right = 2
for c in range(1,N-1):
    # left side
    p = CA[left]
    q = CA[c] - CA[left]
    while True:
        pi = CA[left+1]
        qi = CA[c] - CA[left+1]
        if abs(pi- qi) >= abs(p - q):
            break
        p = pi; q = qi
        left += 1

    # right side
    r = CA[right] - CA[c]
    s = CA[-1] - CA[right]
    while True:
        ri = CA[right+1] - CA[c]
        si = CA[-1] - CA[right+1]
        if abs(ri- si) >= abs(r - s):
            break
        r = ri; s = si
        right += 1

    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)

Buggy python submission (verdict: Time Limit Exceeded):
def solve():
    N = int(input())
    A = tuple(map(int, input().split()))

    from itertools import accumulate
    CA = list(accumulate(A))

    mindiff = CA[-1]
    for c in range(1,N-2):
        # left side
        p = 0
        q = CA[-1]
        for i in range(0, c):
            pi = CA[i]
            qi = CA[c] - CA[i]
            if abs(pi- qi) < abs(p - q):
                p = pi; q = qi
            else:
                break

        # right side
        r = 0
        s = CA[-1]
        for i in range(c+1, N):
            ri = CA[i] - CA[c]
            si = CA[-1] - CA[i]
            if abs(ri- si) < abs(r - s):
                r = ri; s = si
            else:
                break
    
        mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
    return mindiff
print(solve())

Fixed submission:
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
left = 0
right = 2
for c in range(1,N-1):
    # left side
    p = CA[left]
    q = CA[c] - CA[left]
    while True:
        pi = CA[left+1]
        qi = CA[c] - CA[left+1]
        if abs(pi- qi) >= abs(p - q):
            break
        p = pi; q = qi
        left += 1

    # right side
    r = CA[right] - CA[c]
    s = CA[-1] - CA[right]
    while True:
        ri = CA[right+1] - CA[c]
        si = CA[-1] - CA[right+1]
        if abs(ri- si) >= abs(r - s):
            break
        r = ri; s = si
        right += 1

    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
for c in range(1,N-2):
    # left side
    p = 0
    q = CA[-1]
    for i in range(0, c):
        pi = CA[i]
        qi = CA[c] - CA[i]
        if abs(pi- qi) < abs(p - q):
            p = pi; q = qi
        else:
            break

    # right side
    r = 0
    s = CA[-1]
    for i in range(c+1, N):
        ri = CA[i] - CA[c]
        si = CA[-1] - CA[i]
        if abs(ri- si) < abs(r - s):
            r = ri; s = si
        else:
            break
    
    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)

Fixed submission:
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
left = 0
right = 2
for c in range(1,N-1):
    # left side
    p = CA[left]
    q = CA[c] - CA[left]
    while True:
        pi = CA[left+1]
        qi = CA[c] - CA[left+1]
        if abs(pi- qi) >= abs(p - q):
            break
        p = pi; q = qi
        left += 1

    # right side
    r = CA[right] - CA[c]
    s = CA[-1] - CA[right]
    while True:
        ri = CA[right+1] - CA[c]
        si = CA[-1] - CA[right+1]
        if abs(ri- si) >= abs(r - s):
            break
        r = ri; s = si
        right += 1

    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = tuple(map(int, input().split()))
CA = []
cumsum = 0
for a in A:
    cumsum += a
    CA.append(cumsum)

mindiff = CA[-1]
for c in range(1,N-2):
    # left side
    p = 0
    q = CA[-1]
    for i in range(0, c):
        pi = CA[i]
        qi = CA[c] - CA[i]
        if abs(pi- qi) <= abs(p - q):
            p = pi; q = qi
        else:
            break

    # right side
    r = 0
    s = CA[-1]
    for i in range(c+1, N):
        ri = CA[i] - CA[c]
        si = CA[-1] - CA[i]
        if abs(ri- si) <= abs(r - s):
            r = ri; s = si
        else:
            break
    
    mindiff = min(mindiff, max([p, q, r, s]) - min([p, q, r, s]))
print(mindiff)

Fixed submission:
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
left = 0
right = 2
for c in range(1,N-1):
    # left side
    p = CA[left]
    q = CA[c] - CA[left]
    while True:
        pi = CA[left+1]
        qi = CA[c] - CA[left+1]
        if abs(pi- qi) >= abs(p - q):
            break
        p = pi; q = qi
        left += 1

    # right side
    r = CA[right] - CA[c]
    s = CA[-1] - CA[right]
    while True:
        ri = CA[right+1] - CA[c]
        si = CA[-1] - CA[right+1]
        if abs(ri- si) >= abs(r - s):
            break
        r = ri; s = si
        right += 1

    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = tuple(map(int, input().split()))
CA = []
cumsum = 0
for a in A:
    cumsum += a
    CA.append(cumsum)

mindiff = CA[-1]
for c in range(1,N-2):
    # left side
    p = 0
    q = CA[-1]
    for i in range(0, c):
        pi = CA[i]
        qi = CA[c] - CA[i]
        if abs(pi- qi) <= abs(p - q):
            p = pi; q = qi
        else:
            break

    # right side
    r = 0
    s = CA[-1]
    for i in range(c+1, N):
        ri = CA[i] - CA[c]
        si = CA[-1] - CA[i]
        if abs(ri- si) <= abs(r - s):
            r = ri; s = si
        else:
            break
    
    mindiff = min(mindiff, max([p, q, r, s]) - min([p, q, r, s]))
print(mindiff)

Fixed submission:
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
left = 0
right = 2
for c in range(1,N-1):
    # left side
    p = CA[left]
    q = CA[c] - CA[left]
    while True:
        pi = CA[left+1]
        qi = CA[c] - CA[left+1]
        if abs(pi- qi) >= abs(p - q):
            break
        p = pi; q = qi
        left += 1

    # right side
    r = CA[right] - CA[c]
    s = CA[-1] - CA[right]
    while True:
        ri = CA[right+1] - CA[c]
        si = CA[-1] - CA[right+1]
        if abs(ri- si) >= abs(r - s):
            break
        r = ri; s = si
        right += 1

    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)

Buggy python submission (verdict: Time Limit Exceeded):
N = int(input())
A = tuple(map(int, input().split()))
CA = []
cumsum = 0
for a in A:
    cumsum += a
    CA.append(cumsum)

mindiff = CA[-1]
for i in range(0, N-3):
    p = CA[i]
    for j in range(i+1, N-2):
        q =  CA[j] - CA[i]
        for k in range(j+1, N-1):
            r = CA[k] - CA[j]
            s = CA[-1] - CA[k]
            mindiff = min(mindiff, max([p, q, r, s]) - min([p, q, r, s]))
print(mindiff)

Fixed submission:
N = int(input())
A = tuple(map(int, input().split()))

from itertools import accumulate
CA = list(accumulate(A))

mindiff = CA[-1]
left = 0
right = 2
for c in range(1,N-1):
    # left side
    p = CA[left]
    q = CA[c] - CA[left]
    while True:
        pi = CA[left+1]
        qi = CA[c] - CA[left+1]
        if abs(pi- qi) >= abs(p - q):
            break
        p = pi; q = qi
        left += 1

    # right side
    r = CA[right] - CA[c]
    s = CA[-1] - CA[right]
    while True:
        ri = CA[right+1] - CA[c]
        si = CA[-1] - CA[right+1]
        if abs(ri- si) >= abs(r - s):
            break
        r = ri; s = si
        right += 1

    mindiff = min(mindiff, max(p, q, r, s) - min(p, q, r, s))
print(mindiff)