Buggy python submission (verdict: Runtime Error):
n=int(input())
x=list(map(int,input().split()))

import numpy as np
import fractions as frc
from functools import reduce
from copy import deepcopy

x2=deepcopy(x)

def gcd_list(lst):
    return reduce(frc.gcd, lst)

while True:
	n=len(x)
	g=[]
	if n<=5:
		if n==2:
			res=max(x)
			break
		else:
			for i in range(n):
				f=[]
				for j in range(n):
					if j!=i:            
						f.append(x[j])
				g.append(gcd_list(f))
			idx=np.argmax(g)
			rm=x[idx]
			x3=[c for c in x2 if c!=rm]
			res=gcd_list(x3)
			break
	sp=n//2
	y=x[:sp]
	z=x[sp:]
	y_gcd=gcd_list(y)
	z_gcd=gcd_list(z)
	if y_gcd>z_gcd:
		x=z
	else:
		x=y

print(res)

Fixed submission:
n=int(input())
x=list(map(int,input().split()))

import fractions as frc

y=[0]*n
z=[0]*n

cd=x[0]
for i in range(n):
	cd=frc.gcd(cd,x[i])
	y[i]=cd

#print(y)

cd=x[n-1]
for i in range(n-1,-1,-1):
	cd=frc.gcd(cd,x[i])
	z[i]=cd

#print(z)

res=[0]*n
for i in range(n):
	if i==0:
		res[0]=z[1]
	else:
		if i==n-1:
			res[n-1]=y[n-2]
		else:
			res[i]=frc.gcd(y[i-1],z[i+1])

#print(res)

print(max(res))

Buggy python submission (verdict: Runtime Error):
n=int(input())
x=list(map(int,input().split()))

import numpy as np
import fractions as frc
from functools import reduce
from copy import deepcopy

x2=deepcopy(x)

def gcd_list(lst):
    return reduce(frc.gcd, lst)

while True:
	n=len(x)
	g=[]
	if n<=5:
		if n==2:
			res=max(x)
			break
		else:
			for i in range(n):
				f=[]
				for j in range(n):
					if j!=i:            
						f.append(x[i])
				g.append(gcd_list(f))
			idx=np.argmax(g)
			rm=x[idx]
			x3=[c for c in x2 if c!=rm]
			res=gcd_list(x3)
			break
	sp=n//2
	y=x[:sp]
	z=x[sp:]
	y_gcd=gcd_list(y)
	z_gcd=gcd_list(z)
	if y_gcd>z_gcd:
		x=z
	else:
		x=y

print(res)

Fixed submission:
n=int(input())
x=list(map(int,input().split()))

import fractions as frc

y=[0]*n
z=[0]*n

cd=x[0]
for i in range(n):
	cd=frc.gcd(cd,x[i])
	y[i]=cd

#print(y)

cd=x[n-1]
for i in range(n-1,-1,-1):
	cd=frc.gcd(cd,x[i])
	z[i]=cd

#print(z)

res=[0]*n
for i in range(n):
	if i==0:
		res[0]=z[1]
	else:
		if i==n-1:
			res[n-1]=y[n-2]
		else:
			res[i]=frc.gcd(y[i-1],z[i+1])

#print(res)

print(max(res))

Buggy python submission (verdict: Runtime Error):
n=int(input())
x=list(map(int,input().split()))

import numpy as np
import fractions as frc
from functools import reduce
from copy import deepcopy

x2=deepcopy(x)

def gcd_list(lst):
    return reduce(frc.gcd, lst)

while True:
	n=len(x)
	g=[]
	if n<=5:
		if n==2:
			res=max(x)
			break
		else:
			for i in range(n):
				f=[c for c in x if c!=x[i]]
				g.append(gcd_list(f))
			idx=np.argmax(g)
			rm=x[idx]
			x3=[c for c in x2 if c!=rm]
			res=gcd_list(x3)
			break
	sp=n//2
	y=x[:sp]
	z=x[sp:]
	y_gcd=gcd_list(y)
	z_gcd=gcd_list(z)
	if y_gcd>z_gcd:
		x=z
	else:
		x=y

print(res)

Fixed submission:
n=int(input())
x=list(map(int,input().split()))

import fractions as frc

y=[0]*n
z=[0]*n

cd=x[0]
for i in range(n):
	cd=frc.gcd(cd,x[i])
	y[i]=cd

#print(y)

cd=x[n-1]
for i in range(n-1,-1,-1):
	cd=frc.gcd(cd,x[i])
	z[i]=cd

#print(z)

res=[0]*n
for i in range(n):
	if i==0:
		res[0]=z[1]
	else:
		if i==n-1:
			res[n-1]=y[n-2]
		else:
			res[i]=frc.gcd(y[i-1],z[i+1])

#print(res)

print(max(res))