Buggy python submission (verdict: Runtime Error):
import math
n = int(input())
a = list(map(int, input().split()))
max_gcd = 1

def left_gcd(i):
    # i >= 1
    index = 0
    current_gcd = a[0]
    while index < i:
        current_gcd = math.gcd(current_gcd, a[index])
        index += 1

    return current_gcd

def right_gcd(i):
    # i < n-1
    index = n-1
    current_gcd = a[index]
    while index > i:
        current_gcd = math.gcd(current_gcd, a[index])
        index -= 1
    return current_gcd

for i in range(n):
    temp_gcd = 1
    if i == 0:
        temp_gcd = right_gcd(i)
    elif i == n-1:
        temp_gcd = left_gcd(i)
    else: 
        temp_gcd = math.gcd(left_gcd(i), right_gcd(i))
    max_gcd = max(temp_gcd, max_gcd)

print(max_gcd)

Fixed submission:
def gcd(a,b):
    l = max(a,b)
    s = min(a,b)
    if s == 0:
        return l
    else:
        return gcd(s, l%s)

n = int(input())
a = [0] + list(map(int, input().split())) + [0]
max_gcd = 1
L = [0] * (n+2)
R = [0] * (n+2)

for i in range(1,n+2):
    L[i] = gcd(a[i],L[i-1])
    R[n+1-i] = gcd(a[n+1-i], R[n+2-i])
for i in range(1,n+1):
    max_gcd = max(max_gcd,gcd(L[i-1], R[i+1]))

print(max_gcd)

Buggy python submission (verdict: Runtime Error):
import math
n = int(input())
a = list(map(int, input().split()))
a.sort()
max_gcd = 1

def gcd_3(n1,n2,n3):
    return math.gcd(math.gcd(n1,n2),math.gcd(n1,n3))

if len(a) == 2:
    max_gcd = max(a)
elif len(a) == 3:
    gcd1 = math.gcd(a[0],a[1])
    gcd2 = math.gcd(a[1],a[2])
    gcd3 = math.gcd(a[0],a[2])
    max_gcd = max(gcd1,gcd2,gcd3)
else:
    gcd1 = gcd_3(a[0], a[1],a[2])
    gcd2 = gcd_3(a[1], a[2],a[3])
    gcd3 = gcd_3(a[2], a[0],a[3])
    gcd4 = gcd_3(a[0],a[1],a[3])
    max_gcd = max(gcd1,gcd2, gcd3, gcd4)

print(max_gcd)

Fixed submission:
def gcd(a,b):
    l = max(a,b)
    s = min(a,b)
    if s == 0:
        return l
    else:
        return gcd(s, l%s)

n = int(input())
a = [0] + list(map(int, input().split())) + [0]
max_gcd = 1
L = [0] * (n+2)
R = [0] * (n+2)

for i in range(1,n+2):
    L[i] = gcd(a[i],L[i-1])
    R[n+1-i] = gcd(a[n+1-i], R[n+2-i])
for i in range(1,n+1):
    max_gcd = max(max_gcd,gcd(L[i-1], R[i+1]))

print(max_gcd)

Buggy python submission (verdict: Runtime Error):
import math
n = int(input())
a = list(map(int, input().split()))
a.sort()
max_gcd = 1
if len(a) == 2:
    max_gcd = max(a)
else:
    gcd1 = math.gcd(a[0], a[1],a[2])
    gcd2 = math.gcd(a[1], a[2],a[3])
    gcd3 = math.gcd(a[2], a[0],a[3])
    gcd4 = math.gcd(a[0],a[1],a[3])
    max_gcd = max(gcd1,gcd2, gcd3, gcd4)

print(max_gcd)

Fixed submission:
def gcd(a,b):
    l = max(a,b)
    s = min(a,b)
    if s == 0:
        return l
    else:
        return gcd(s, l%s)

n = int(input())
a = [0] + list(map(int, input().split())) + [0]
max_gcd = 1
L = [0] * (n+2)
R = [0] * (n+2)

for i in range(1,n+2):
    L[i] = gcd(a[i],L[i-1])
    R[n+1-i] = gcd(a[n+1-i], R[n+2-i])
for i in range(1,n+1):
    max_gcd = max(max_gcd,gcd(L[i-1], R[i+1]))

print(max_gcd)

Buggy python submission (verdict: Runtime Error):
import math
n = int(input())
a = list(map(int, input().split()))
a.sort()
max_gcd = 1
if len(a) == 2:
    max_gcd = max(a)
else:
    gcd1 = math.gcd(a[0], a[1])
    gcd2 = math.gcd(a[1], a[2])
    gcd3 = math.gcd(a[2], a[0])
    max_gcd = max(gcd1,gcd2, gcd3)

print(max_gcd)

Fixed submission:
def gcd(a,b):
    l = max(a,b)
    s = min(a,b)
    if s == 0:
        return l
    else:
        return gcd(s, l%s)

n = int(input())
a = [0] + list(map(int, input().split())) + [0]
max_gcd = 1
L = [0] * (n+2)
R = [0] * (n+2)

for i in range(1,n+2):
    L[i] = gcd(a[i],L[i-1])
    R[n+1-i] = gcd(a[n+1-i], R[n+2-i])
for i in range(1,n+1):
    max_gcd = max(max_gcd,gcd(L[i-1], R[i+1]))

print(max_gcd)