Buggy python submission (verdict: Runtime Error):
class SegmentTree():
    def __init__(self, arr, func=min, ie=2**63):
        self.h = (len(arr) - 1).bit_length()
        self.n = 2**self.h
        self.ie = ie
        self.func = func
        self.tree = [ie for _ in range(2 * self.n)]
        for i in range(len(arr)):
            self.tree[self.n + i] = arr[i]
        for i in range(1, self.n)[::-1]:
            self.tree[i] = func(self.tree[2 * i], self.tree[2 * i + 1])

    def set(self, idx, x):
        idx += self.n
        self.tree[idx] = x
        while idx:
            idx >>= 1
            self.tree[idx] = self.func(self.tree[2 * idx], self.tree[2 * idx + 1])

    def query(self, lt, rt):
        lt += self.n
        rt += self.n
        vl = vr = self.ie
        while rt - lt > 0:
            if lt & 1:
                vl = self.func(vl, self.tree[lt])
                lt += 1
            if rt & 1:
                rt -= 1
                vr = self.func(self.tree[rt], vr)
            lt >>= 1
            rt >>= 1
        return self.func(vl, vr)

def gcd(x, y):
    while y:
        x, y = y, x % y
    return x

N = int(input())
A = list(map(int, input().split()))

st = SegmentTree(A, gcd, 0)
res = 1

for i in range(N):
    res = max(res, gcd(st.query(0, i), st.query(i + 1, N + 1)))

print(res)

Fixed submission:
def gcd(x,y):
  if y == 0:
    return x
  else:
    return gcd(y,x%y)

n = int(input())
A = list(map(int,input().split()))

accum_gcd = []
gcd_A = A[0]
for j in range(n):
    gcd_A = gcd(gcd_A,A[j])
    accum_gcd.append(gcd(gcd_A,A[j]))

accum_gcd_i = []
A_i = A[::-1]
gcd_A_i = A_i[0]
for j in range(n):
    gcd_A_i = gcd(gcd_A_i,A_i[j])
    accum_gcd_i.append(gcd(gcd_A_i,A_i[j]))

accum_gcd_pop = []

for j in range(n):
    if j == 0:
        accum_gcd_pop.append(accum_gcd_i[n-2])
    elif j == n-1:
        accum_gcd_pop.append(accum_gcd[n-2])
    else:
        accum_gcd_pop.append(gcd(accum_gcd[j-1],accum_gcd_i[n-j-2]))
print(max(accum_gcd_pop))

Buggy python submission (verdict: Time Limit Exceeded):
def gcd(x,y):
  if y == 0:
    return x
  else:
    return gcd(y,x%y)
n = int(input())
A = list(map(int,input().split()))
gcd_A_all = []
for i in range(n):
    A_pop = [a for a in A[0:i] + A[i+1:n]]
    gcd_A = A_pop[0]
    for j in range(n-1):
        gcd_A = gcd(gcd_A, A_pop[j])
    gcd_A_all.append(gcd_A)
print(max(gcd_A_all))

Fixed submission:
def gcd(x,y):
  if y == 0:
    return x
  else:
    return gcd(y,x%y)

n = int(input())
A = list(map(int,input().split()))

accum_gcd = []
gcd_A = A[0]
for j in range(n):
    gcd_A = gcd(gcd_A,A[j])
    accum_gcd.append(gcd(gcd_A,A[j]))

accum_gcd_i = []
A_i = A[::-1]
gcd_A_i = A_i[0]
for j in range(n):
    gcd_A_i = gcd(gcd_A_i,A_i[j])
    accum_gcd_i.append(gcd(gcd_A_i,A_i[j]))

accum_gcd_pop = []

for j in range(n):
    if j == 0:
        accum_gcd_pop.append(accum_gcd_i[n-2])
    elif j == n-1:
        accum_gcd_pop.append(accum_gcd[n-2])
    else:
        accum_gcd_pop.append(gcd(accum_gcd[j-1],accum_gcd_i[n-j-2]))
print(max(accum_gcd_pop))

Buggy python submission (verdict: Runtime Error):
def gcd(x,y):
  if y == 0:
    return x
  else:
    return gcd(y,x%y)
gcd_A_all = []
for i in range(n):
    A_pop = [a for a in A[0:i] + A[i+1:n]]
    gcd_A = A_pop[0]
    for j in range(n-1):
        gcd_A = gcd(gcd_A, A_pop[j])
    gcd_A_all.append(gcd_A)
print(max(gcd_A_all))

Fixed submission:
def gcd(x,y):
  if y == 0:
    return x
  else:
    return gcd(y,x%y)

n = int(input())
A = list(map(int,input().split()))

accum_gcd = []
gcd_A = A[0]
for j in range(n):
    gcd_A = gcd(gcd_A,A[j])
    accum_gcd.append(gcd(gcd_A,A[j]))

accum_gcd_i = []
A_i = A[::-1]
gcd_A_i = A_i[0]
for j in range(n):
    gcd_A_i = gcd(gcd_A_i,A_i[j])
    accum_gcd_i.append(gcd(gcd_A_i,A_i[j]))

accum_gcd_pop = []

for j in range(n):
    if j == 0:
        accum_gcd_pop.append(accum_gcd_i[n-2])
    elif j == n-1:
        accum_gcd_pop.append(accum_gcd[n-2])
    else:
        accum_gcd_pop.append(gcd(accum_gcd[j-1],accum_gcd_i[n-j-2]))
print(max(accum_gcd_pop))