Buggy python submission (verdict: Runtime Error):
import sys
import fractions
input = sys.stdin.readline
import heapq


def main():
    N = int(input())
    A = [int(x) for x in input().split()]

    A_sorted = sorted(list(set(A)))

    if len(A_sorted) <= 2:
        print(max(A_sorted))
        exit()

    min = 10 ** 10
    min_index = -1
    for i in range(N - 1):
        x = fractions.gcd(A_sorted[i], A_sorted[i + 1])
        if min > x:
            min = x
            min_index = i

    gcd = A_sorted[0]
    if min_index == 0:
        gcd = A_sorted[2]

    for i in range(N):
        if i == min_index or i == min_index + 1:
            continue
        gcd = fractions.gcd(gcd, A_sorted[i])

    x = fractions.gcd(gcd, A_sorted[min_index])
    y = fractions.gcd(gcd, A_sorted[min_index + 1])

    print(max([x, y]))

if __name__ == '__main__':
    main()



Fixed submission:
import sys
import fractions
input = sys.stdin.readline
import heapq

def make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)

    # divisors.sort()
    return divisors

def main():
    N = int(input())
    A = [int(x) for x in input().split()]

    A_sorted = sorted(A)
    div0 = make_divisors(A_sorted[0])
    ans = 1
    for d in div0[1:]:
        count = 0
        isAns = True
        for i in A_sorted[1:]:
            if i % d != 0:
                count += 1
                if count == 2:
                    isAns = False
                    break
        if isAns:
            ans = max(ans, d)
    div1 = make_divisors(A_sorted[1])
    for d in div1[1:]:
        count = 0
        isAns = True
        for i in A_sorted[2:]:
            if i % d != 0:
                isAns = False
                break
        if isAns:
            ans = max(ans, d)

    print(ans)

if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
import sys
import fractions
input = sys.stdin.readline
import heapq


def main():
    N = int(input())
    A = [int(x) for x in input().split()]

    A_sorted = sorted(set(A))

    if len(A) == 2:
        print(max(A))
        exit()

    min = 10 ** 10
    min_index = -1
    for i in range(N - 1):
        x = fractions.gcd(A_sorted[i], A_sorted[i + 1])
        if min > x:
            min = x
            min_index = i

    gcd = A_sorted[0]
    if min_index == 0:
        gcd = A_sorted[2]

    for i in range(N):
        if i == min_index or i == min_index + 1:
            continue
        gcd = fractions.gcd(gcd, A_sorted[i])

    x = fractions.gcd(gcd, A_sorted[min_index])
    y = fractions.gcd(gcd, A_sorted[min_index + 1])

    print(max([x, y]))

if __name__ == '__main__':
    main()



Fixed submission:
import sys
import fractions
input = sys.stdin.readline
import heapq

def make_divisors(n):
    divisors = []
    for i in range(1, int(n**0.5)+1):
        if n % i == 0:
            divisors.append(i)
            if i != n // i:
                divisors.append(n//i)

    # divisors.sort()
    return divisors

def main():
    N = int(input())
    A = [int(x) for x in input().split()]

    A_sorted = sorted(A)
    div0 = make_divisors(A_sorted[0])
    ans = 1
    for d in div0[1:]:
        count = 0
        isAns = True
        for i in A_sorted[1:]:
            if i % d != 0:
                count += 1
                if count == 2:
                    isAns = False
                    break
        if isAns:
            ans = max(ans, d)
    div1 = make_divisors(A_sorted[1])
    for d in div1[1:]:
        count = 0
        isAns = True
        for i in A_sorted[2:]:
            if i % d != 0:
                isAns = False
                break
        if isAns:
            ans = max(ans, d)

    print(ans)

if __name__ == '__main__':
    main()