Buggy python submission (verdict: Runtime Error):
from math import gcd
from functools import reduce
def gcd_list(numbers):
    return reduce(gcd, numbers)
n = int(input())
a = [int(_) for _ in input().split()]
a.sort()
ir = [a[0]]
for i in range(1,n):
    ir.append(gcd(a[0], a[i]))
mi = ir[1:].index(min(ir[1:]))+1
mr = []
for i in range(n):
    mr.append(gcd(a[mi], a[i]))
if ir.count(min(ir)) > mr.count(min(mr)):
    print(gcd_list(a[1::]))
elif ir.count(min(ir)) == mr.count(min(mr)):
    print(a[0])
elif ir.count(min(ir)) < mr.count(min(mr)):
    a.pop(mi)
    print(gcd_list(a))


Fixed submission:
import math
def get_div_list(num):
    if num == 1:
        return [1]
    else:
        div_list = []
        div_list.append(1)
        div_list.append(num)
        for i in range(2, math.floor(math.sqrt(num))+ 1):
            if num % i == 0:
                div_list.append(i)
                div_list.append(num // i)
        list(set(div_list))
        div_list.sort(reverse = True)
        return div_list
n = int(input())
a = [int(_) for _ in input().split()]
d = sorted(list(set(get_div_list(a[0])+get_div_list(a[1]))))[::-1]
for i in range(len(d)):
    cnt = 0
    for j in range(n):
        if a[j]%d[i]==0:cnt+=1
    if cnt >= n-1:
        print(d[i])
        break

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

def gcd_list(numbers):
    return reduce(gcd, numbers)

n = int(input())
a = [int(_) for _ in input().split()]
a.sort()
ir = [a[0]]
for i in range(1,n):
    ir.append(gcd(a[0], a[i]))
mi = ir.index(min(ir))
mr = []
for i in range(n):
    mr.append(gcd(a[mi], a[i]))
if ir.count(min(ir)) > mr.count(min(mr)):
    print(gcd_list(a[1::]))
elif ir.count(min(ir)) == mr.count(min(mr)):
    print(a[0])
elif ir.count(min(ir)) < mr.count(min(mr)):
    a.pop(mi)
    print(gcd_list(a))


Fixed submission:
import math
def get_div_list(num):
    if num == 1:
        return [1]
    else:
        div_list = []
        div_list.append(1)
        div_list.append(num)
        for i in range(2, math.floor(math.sqrt(num))+ 1):
            if num % i == 0:
                div_list.append(i)
                div_list.append(num // i)
        list(set(div_list))
        div_list.sort(reverse = True)
        return div_list
n = int(input())
a = [int(_) for _ in input().split()]
d = sorted(list(set(get_div_list(a[0])+get_div_list(a[1]))))[::-1]
for i in range(len(d)):
    cnt = 0
    for j in range(n):
        if a[j]%d[i]==0:cnt+=1
    if cnt >= n-1:
        print(d[i])
        break

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

def gcd_list(numbers):
    return reduce(gcd, numbers)

n = int(input())
a = [int(_) for _ in input().split()]
a.sort()
ir = [a[0]]
for i in range(1,n):
    ir.append(gcd(a[0], a[i]))
mi = ir.index(min(ir))
mr = []
for i in range(n):
    mr.append(gcd(a[mi], a[i]))
if ir.count(min(ir)) > mr.count(min(mr)):
    print(gcd_list(a[1::]))
elif ir.count(min(ir)) == mr.count(min(mr)):
    print(a[0])
elif ir.count(min(ir)) < mr.count(min(mr)):
    b = a[:mi] + a[mi+1:]
    print(gcd_list(b))


Fixed submission:
import math
def get_div_list(num):
    if num == 1:
        return [1]
    else:
        div_list = []
        div_list.append(1)
        div_list.append(num)
        for i in range(2, math.floor(math.sqrt(num))+ 1):
            if num % i == 0:
                div_list.append(i)
                div_list.append(num // i)
        list(set(div_list))
        div_list.sort(reverse = True)
        return div_list
n = int(input())
a = [int(_) for _ in input().split()]
d = sorted(list(set(get_div_list(a[0])+get_div_list(a[1]))))[::-1]
for i in range(len(d)):
    cnt = 0
    for j in range(n):
        if a[j]%d[i]==0:cnt+=1
    if cnt >= n-1:
        print(d[i])
        break