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

n = int(input())
as_ = [int(i) for i in input().split()]


def gcds(list_):
    return list(itertools.accumulate(list_, fractions.gcd))


def rotate(list_):
    list_ = list_[1:] + list_[0:1]
    return list_


max_cand = []
for i in range(len(as_)):
    as_ = as_[1:] + as_[0:1]
    max_cand.append(gcds(as_)[-2])


print(max(max_cand))


Fixed submission:
import fractions
import itertools

n = int(input())
as_ = [int(i) for i in input().split()]


def gcds(list_):
    return list(itertools.accumulate(list_, fractions.gcd))


def reversed_gcds(list_):
    return list(itertools.accumulate(reversed(list_), fractions.gcd))


as_accum_gcd, as_rev_accum_gcd = gcds(as_), reversed_gcds(as_)

dropped_gcds = []
for i in range(len(as_)):
    if i == 0:
        dropped_gcd = as_rev_accum_gcd[-2]
    elif i == len(as_) - 1:
        dropped_gcd = as_accum_gcd[-2]
    else:
        dropped_gcd = fractions.gcd(as_accum_gcd[i - 1], as_rev_accum_gcd[-2 - i])
    dropped_gcds.append(dropped_gcd)

print(max(dropped_gcds))

Buggy python submission (verdict: Time Limit Exceeded):
# import math
import functools

n = int(input())
as_ = [int(i) for i in input().split()]


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


def gcds(list_):
    return functools.reduce(gcd, list_)


def drop(list_, i):
    list_copy = list_.copy()
    del list_copy[i]
    return list_copy


print(max(gcds(drop(as_, i)) for i, _ in enumerate(as_)))


Fixed submission:
import fractions
import itertools

n = int(input())
as_ = [int(i) for i in input().split()]


def gcds(list_):
    return list(itertools.accumulate(list_, fractions.gcd))


def reversed_gcds(list_):
    return list(itertools.accumulate(reversed(list_), fractions.gcd))


as_accum_gcd, as_rev_accum_gcd = gcds(as_), reversed_gcds(as_)

dropped_gcds = []
for i in range(len(as_)):
    if i == 0:
        dropped_gcd = as_rev_accum_gcd[-2]
    elif i == len(as_) - 1:
        dropped_gcd = as_accum_gcd[-2]
    else:
        dropped_gcd = fractions.gcd(as_accum_gcd[i - 1], as_rev_accum_gcd[-2 - i])
    dropped_gcds.append(dropped_gcd)

print(max(dropped_gcds))

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

n = int(input())
as_ = [int(i) for i in input().split()]


def gcds(list_):
    return functools.reduce(math.gcd, list_)


def drop(list_, i):
    list_copy = list_.copy()
    del list_copy[i]
    return list_copy


print(max(gcds(drop(as_, i)) for i, _ in enumerate(as_)))


Fixed submission:
import fractions
import itertools

n = int(input())
as_ = [int(i) for i in input().split()]


def gcds(list_):
    return list(itertools.accumulate(list_, fractions.gcd))


def reversed_gcds(list_):
    return list(itertools.accumulate(reversed(list_), fractions.gcd))


as_accum_gcd, as_rev_accum_gcd = gcds(as_), reversed_gcds(as_)

dropped_gcds = []
for i in range(len(as_)):
    if i == 0:
        dropped_gcd = as_rev_accum_gcd[-2]
    elif i == len(as_) - 1:
        dropped_gcd = as_accum_gcd[-2]
    else:
        dropped_gcd = fractions.gcd(as_accum_gcd[i - 1], as_rev_accum_gcd[-2 - i])
    dropped_gcds.append(dropped_gcd)

print(max(dropped_gcds))