Buggy python submission (verdict: Runtime Error):
def ans_is_zero():
    print(0)
    exit(0)

def solve():
    n=int(input())
    if n > 23: ans_is_zero()

    d=list(map(int,input().split()))
    for num in d:
        if num == 0: ans_is_zero()

    ans=0

    N = 1 << n
    for i in range(N):#left or right
        t=1

        for j in range(n):
            if (i>>j)&1: num = d[j]
            else: num = 24 - d[j]

            if (t >> num)&1:
                ret = -1
                break
        if ret == -1:
            continue

        if bin(t).count("1") < n + 1:#重複あり
            continue

        ret = 100
        prev = 0
        for j in range(1, 24):
            if ((t>>j)&1) == 0: continue
            ret = min(ret, j - prev)
            prev = j

        ret = min(ret, 24-prev)
        ans = max(ans, ret)
    print(ans)
solve()


Fixed submission:
def ans_is_zero():
    print(0)
    exit(0)

def solve():
    n=int(input())
    if n > 23: ans_is_zero()

    d=list(map(int,input().split()))
    for num in d:
        if num == 0: ans_is_zero()

    ans=0

    N = 1 << n
    for i in range(N):#left or right
        t=1
        ret = 100
        for j in range(n):
            if (i>>j)&1: num = d[j]
            else: num = 24 - d[j]

            if (t >> num)&1:
                ret = -1
                break
            t |= (1 << num)
        
        if ret == -1:
            continue

        if bin(t).count("1") < n + 1:#重複あり
            continue

        prev = 0
        for j in range(1, 24):
            if ((t>>j)&1) == 0: continue
            ret = min(ret, j - prev)
            prev = j

        ret = min(ret, 24-prev)
        ans = max(ans, ret)
    print(ans)
solve()

Buggy python submission (verdict: Time Limit Exceeded):
def ans_is_zero():
    print(0)
    exit(0)

def solve():
    n=int(input())
    if n > 23: ans_is_zero()

    d=list(map(int,input().split()))
    for num in d:
        if num == 0: ans_is_zero()

    ans=0

    N = 1 << n
    for i in range(N):#left or right
        t=1

        for j in range(n):
            if (i>>j)&1: t |= (1 << d[j])
            else: t |= (1 << (24 - d[j]))

        if bin(t).count("1") < n + 1:#重複あり
            continue

        ret = 100
        prev = 0
        for j in range(1, 24):
            if ((t>>j)&1) == 0: continue
            ret = min(ret, j - prev)
            prev = j

        ret = min(ret, 24-prev)
        ans = max(ans, ret)
    print(ans)
solve()


Fixed submission:
def ans_is_zero():
    print(0)
    exit(0)

def solve():
    n=int(input())
    if n > 23: ans_is_zero()

    d=list(map(int,input().split()))
    for num in d:
        if num == 0: ans_is_zero()

    ans=0

    N = 1 << n
    for i in range(N):#left or right
        t=1
        ret = 100
        for j in range(n):
            if (i>>j)&1: num = d[j]
            else: num = 24 - d[j]

            if (t >> num)&1:
                ret = -1
                break
            t |= (1 << num)
        
        if ret == -1:
            continue

        if bin(t).count("1") < n + 1:#重複あり
            continue

        prev = 0
        for j in range(1, 24):
            if ((t>>j)&1) == 0: continue
            ret = min(ret, j - prev)
            prev = j

        ret = min(ret, 24-prev)
        ans = max(ans, ret)
    print(ans)
solve()