Buggy python submission (verdict: Runtime Error):
import fractions
N = int(input())
values = ([int(x) for x in input().split()])

gcd_from_the_left = []
gcd_from_the_left.append(values[0])
for i in range(N):
	gcd_from_the_left.append(fractions.gcd(gcd_from_the_left[i],values[i]))
gcd_from_the_left.pop(0)

gcd_from_the_right = []
gcd_from_the_right.append(values[-1])
for i in range(N):
	gcd_from_the_right.append(fractions.gcd(gcd_from_the_right[i],values[-i-1]))

gcd_from_the_right.pop(0)

ans = 0
gcd = 0

for i in range(N-2):
  gcd = fractions.gcd(gcd_from_the_left[i],gcd_from_the_right[N-3+i])
  if gcd > ans:
    ans = gcd
    
gcd = gcd_from_the_left[-2]
if gcd > ans:
  ans = gcd
gcd = gcd_from_the_right[-2]
if gcd > ans:
  ans = gcd
print(ans)

Fixed submission:
import fractions
N = int(input())
values = ([int(x) for x in input().split()])

gcd_from_the_left = []
gcd_from_the_left.append(values[0])
for i in range(N):
	gcd_from_the_left.append(fractions.gcd(gcd_from_the_left[i],values[i]))
gcd_from_the_left.pop(0)

gcd_from_the_right = []
gcd_from_the_right.append(values[-1])
for i in range(N):
	gcd_from_the_right.append(fractions.gcd(gcd_from_the_right[i],values[-i-1]))

gcd_from_the_right.pop(0)

ans = 0
gcd = 0

for i in range(N-2):
  gcd = fractions.gcd(gcd_from_the_left[i],gcd_from_the_right[N-i-3])
  if gcd > ans:
    ans = gcd
    
gcd = gcd_from_the_left[-2]
if gcd > ans:
  ans = gcd
gcd = gcd_from_the_right[-2]
if gcd > ans:
  ans = gcd
print(ans)

Buggy python submission (verdict: Runtime Error):
import fractions
N = int(input())
values = ([int(x) for x in input().split()])

gcd_from_the_left = []
gcd_from_the_left.append(values[0])
for i in range(N):
	gcd_from_the_left.append(fractions.gcd(gcd_from_the_left[i],values[i]))
gcd_from_the_left.pop(0)

gcd_from_the_right = []
gcd_from_the_right.append(values[-1])
for i in range(N):
	gcd_from_the_right.append(fractions.gcd(gcd_from_the_right[i],values[-i-1]))

gcd_from_the_right.pop(0)

ans = 0
gcd = 0

for i in range(N):
  gcd = fractions.gcd(gcd_from_the_left[i],gcd_from_the_right[-(N-3+i)])
  if gcd > ans:
    ans = gcd
    
gcd = gcd_from_the_left[-2]
if gcd > ans:
  ans = gcd
gcd = gcd_from_the_right[-2]
if gcd > ans:
  ans = gcd
print(ans)



Fixed submission:
import fractions
N = int(input())
values = ([int(x) for x in input().split()])

gcd_from_the_left = []
gcd_from_the_left.append(values[0])
for i in range(N):
	gcd_from_the_left.append(fractions.gcd(gcd_from_the_left[i],values[i]))
gcd_from_the_left.pop(0)

gcd_from_the_right = []
gcd_from_the_right.append(values[-1])
for i in range(N):
	gcd_from_the_right.append(fractions.gcd(gcd_from_the_right[i],values[-i-1]))

gcd_from_the_right.pop(0)

ans = 0
gcd = 0

for i in range(N-2):
  gcd = fractions.gcd(gcd_from_the_left[i],gcd_from_the_right[N-i-3])
  if gcd > ans:
    ans = gcd
    
gcd = gcd_from_the_left[-2]
if gcd > ans:
  ans = gcd
gcd = gcd_from_the_right[-2]
if gcd > ans:
  ans = gcd
print(ans)

Buggy python submission (verdict: Runtime Error):
import math
import functools
import fractions
from functools import reduce
import itertools
gcd3 = 0
gcd4 = 0
ans = 0
N = int(input())
values = ([int(x) for x in input().split()])

divided_values = [values[i::2] for i in range(2)]

values1 = divided_values[0].copy()
values2 = divided_values[1].copy()
gcd1 = functools.reduce(fractions.gcd,values1)
gcd2 = functools.reduce(fractions.gcd,values2)

for i in range(len(values1)):
  tem = values1.pop(i)
  gcd3 = fractions.gcd(gcd2,functools.reduce(fractions.gcd,values1))
  values1.insert(i,tem)
  if gcd3>gcd4:
    gcd4 = gcd3
    ans = gcd3

if len(values2)>1:
  for i in range(len(values2)):
    tem = values2.pop(i)
    gcd3 = fractions.gcd(gcd1,functools.reduce(fractions.gcd,values2))
    values2.insert(i,tem)
    if gcd3>gcd4:
      gcd4 = gcd3
      ans = gcd3
    
print(ans)

Fixed submission:
import fractions
N = int(input())
values = ([int(x) for x in input().split()])

gcd_from_the_left = []
gcd_from_the_left.append(values[0])
for i in range(N):
	gcd_from_the_left.append(fractions.gcd(gcd_from_the_left[i],values[i]))
gcd_from_the_left.pop(0)

gcd_from_the_right = []
gcd_from_the_right.append(values[-1])
for i in range(N):
	gcd_from_the_right.append(fractions.gcd(gcd_from_the_right[i],values[-i-1]))

gcd_from_the_right.pop(0)

ans = 0
gcd = 0

for i in range(N-2):
  gcd = fractions.gcd(gcd_from_the_left[i],gcd_from_the_right[N-i-3])
  if gcd > ans:
    ans = gcd
    
gcd = gcd_from_the_left[-2]
if gcd > ans:
  ans = gcd
gcd = gcd_from_the_right[-2]
if gcd > ans:
  ans = gcd
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import math
import functools
import fractions
from functools import reduce
import itertools

gcd1 = 0
gcd2 = 0
ans = 0

N = int(input())
values = ([int(x) for x in input().split()])
for i in range(len(values)):
  tem = values.pop(i)
  gcd1 = functools.reduce(fractions.gcd,values)
  values.insert(i,tem)
  if gcd1>gcd2:
    gcd2 = gcd1
    ans = gcd1
    
print(ans)

Fixed submission:
import fractions
N = int(input())
values = ([int(x) for x in input().split()])

gcd_from_the_left = []
gcd_from_the_left.append(values[0])
for i in range(N):
	gcd_from_the_left.append(fractions.gcd(gcd_from_the_left[i],values[i]))
gcd_from_the_left.pop(0)

gcd_from_the_right = []
gcd_from_the_right.append(values[-1])
for i in range(N):
	gcd_from_the_right.append(fractions.gcd(gcd_from_the_right[i],values[-i-1]))

gcd_from_the_right.pop(0)

ans = 0
gcd = 0

for i in range(N-2):
  gcd = fractions.gcd(gcd_from_the_left[i],gcd_from_the_right[N-i-3])
  if gcd > ans:
    ans = gcd
    
gcd = gcd_from_the_left[-2]
if gcd > ans:
  ans = gcd
gcd = gcd_from_the_right[-2]
if gcd > ans:
  ans = gcd
print(ans)