Buggy python submission (verdict: Runtime Error):
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a
  


N = int(input())
A = input().split()
for i in range(N):
    A[i] = int(A[i])
    
if N == 2:
    print(max(A[0],A[1]))
if N >= 3:
    gcd_all = gcd(A[0], A[1])
    gcd_without_1 = A[0]
    gcd_without_2 = A[1]
    gcd_without_1 = max(gcd_all, max( gcd(gcd_without_1, A[i]),gcd(gcd_without_2, A[i])))
    gcd_all = math.gcd(gcd_all,A[2])
    for i in range(3,N):
        gcd_without_1 = max(gcd_all, gcd(gcd_without_1, A[i]))
        gcd_all = gcd(gcd_all,A[i])
    print(max(gcd_all, gcd_without_1))





Fixed submission:
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a
  


N = int(input())
A = input().split()
for i in range(N):
    A[i] = int(A[i])
    
if N == 2:
    print(max(A[0],A[1]))
if N >= 3:
    gcd_all = gcd(A[0], A[1])
    gcd_without_1 = A[0]
    gcd_without_2 = A[1]
    gcd_without_1 = max(gcd_all, max( gcd(gcd_without_1, A[i]),gcd(gcd_without_2, A[i])))
    gcd_all = gcd(gcd_all,A[2])
    for i in range(3,N):
        gcd_without_1 = max(gcd_all, gcd(gcd_without_1, A[i]))
        gcd_all = gcd(gcd_all,A[i])
    print(max(gcd_all, gcd_without_1))

Buggy python submission (verdict: Runtime Error):
import math


N = int(input())
A = input().split()
for i in range(N):
    A[i] = int(A[i])
    
if N == 2:
    print(max(A[0],A[1]))
if N >= 3:
    gcd_all = math.gcd(A[0], A[1])
    gcd_without_1 = A[0]
    gcd_without_2 = A[1]
    gcd_without_1 = max(gcd_all, max( math.gcd(gcd_without_1, A[i]),math.gcd(gcd_without_2, A[i])))
    gcd_all = math.gcd(gcd_all,A[2])
    for i in range(3,N):
        gcd_without_1 = max(gcd_all, math.gcd(gcd_without_1, A[i]))
        gcd_all = math.gcd(gcd_all,A[i])
    print(max(gcd_all, gcd_without_1))





Fixed submission:
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a
  


N = int(input())
A = input().split()
for i in range(N):
    A[i] = int(A[i])
    
if N == 2:
    print(max(A[0],A[1]))
if N >= 3:
    gcd_all = gcd(A[0], A[1])
    gcd_without_1 = A[0]
    gcd_without_2 = A[1]
    gcd_without_1 = max(gcd_all, max( gcd(gcd_without_1, A[i]),gcd(gcd_without_2, A[i])))
    gcd_all = gcd(gcd_all,A[2])
    for i in range(3,N):
        gcd_without_1 = max(gcd_all, gcd(gcd_without_1, A[i]))
        gcd_all = gcd(gcd_all,A[i])
    print(max(gcd_all, gcd_without_1))

Buggy python submission (verdict: Runtime Error):
import math


N = int(input())
A = input().split()
for i in range(N):
    A[i] = int(A[i])
    
if N == 2:
    print(max(A[0],A[1]))
if N >= 3:
    gcd_all = math.gcd(A[0], A[1])
    gcd_without_1 = A[0]
    gcd_without_2 = A[1]
    gcd_without_1 = max(gcd_all, max( math.gcd(gcd_without_1, A[i]),math.gcd(gcd_without_2, A[i])))
    gcd_all = math.gcd(gcd_all,A[2])
    for i in range(3,N):
        gcd_without_1 = max(gcd_all, math.gcd(gcd_without_1, A[i]))
        gcd_all = math.gcd(gcd_all,A[i])
    print(max(gcd_all, gcd_without_1))





Fixed submission:
def gcd(a, b):
	while b:
		a, b = b, a % b
	return a
  


N = int(input())
A = input().split()
for i in range(N):
    A[i] = int(A[i])
    
if N == 2:
    print(max(A[0],A[1]))
if N >= 3:
    gcd_all = gcd(A[0], A[1])
    gcd_without_1 = A[0]
    gcd_without_2 = A[1]
    gcd_without_1 = max(gcd_all, max( gcd(gcd_without_1, A[i]),gcd(gcd_without_2, A[i])))
    gcd_all = gcd(gcd_all,A[2])
    for i in range(3,N):
        gcd_without_1 = max(gcd_all, gcd(gcd_without_1, A[i]))
        gcd_all = gcd(gcd_all,A[i])
    print(max(gcd_all, gcd_without_1))