Buggy python submission (verdict: Time Limit Exceeded):
import sys
from fractions import gcd
from operator import mul
from functools import reduce
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(map(int, inputs[1].split()))
if all((a // reduce(gcd, A)) % 2 for a in A):
    print(round((m+1) / reduce(lambda x, y: x*y // gcd(x, y), A)))
else:
    print(0)

Fixed submission:
import sys
from fractions import gcd
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(set(map(int, inputs[1].split())))

a = A[0]
for i in range(1, len(A)):
    z = gcd(a, A[i])
    x, y = a // z, A[i] // z
    if x % 2 == y % 2 == 1:
        a = x*y*z
    else:
        print(0)
        break
else:
    print(round(((m+1)/a)))

Buggy python submission (verdict: Runtime Error):
import sys
from fractions import gcd
from operator import mul
from functools import reduce
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(map(int, inputs[1].split()))
if all((a // reduce(gcd, A)) % 2 for a in A):
    print(round((m+1) / reduce(lambda x, y: x*y // gcd(x, y), A))
else:
    print(0)

Fixed submission:
import sys
from fractions import gcd
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(set(map(int, inputs[1].split())))

a = A[0]
for i in range(1, len(A)):
    z = gcd(a, A[i])
    x, y = a // z, A[i] // z
    if x % 2 == y % 2 == 1:
        a = x*y*z
    else:
        print(0)
        break
else:
    print(round(((m+1)/a)))

Buggy python submission (verdict: Runtime Error):
import sys
from fractions import gcd
from operator import mul
from functools import reduce
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(set(map(int, inputs[1].split())))
if all((a // reduce(gcd, A)) % 2 for a in A):
    print(round((m+1) / reduce(lambda x, y: x*y // gcd(x, y), A))
else:
    print(0)

Fixed submission:
import sys
from fractions import gcd
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(set(map(int, inputs[1].split())))

a = A[0]
for i in range(1, len(A)):
    z = gcd(a, A[i])
    x, y = a // z, A[i] // z
    if x % 2 == y % 2 == 1:
        a = x*y*z
    else:
        print(0)
        break
else:
    print(round(((m+1)/a)))

Buggy python submission (verdict: Runtime Error):
import sys
from fractions import gcd
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(set(map(int, inputs[1].split())))
B = list(map(lambda x: x//2, A))

prod_A = gcd_A = A[0]
for a in A[1:]:
    gcd_A = gcd(gcd_A, a)
    prod_A *= a
sup = prod_A // gcd_A

C = []
for b in B:
    p, x, c = 0, b*1, {0}
    while x <= sup:
        c.add(x)
        p += 2
        x = b*(p + 1)
    sup = max(c)
    C.append(c)
    
cap_c = C[0]
for c in C[1:]:
    cap_c &= c
cap_c.discard(0)
if not c:
    print(0)
else:
    print((m // min(cap_c) + 1) // 2)

Fixed submission:
import sys
from fractions import gcd
inputs = sys.stdin.readlines()

n, m = map(int, inputs[0].split())
A = list(set(map(int, inputs[1].split())))

a = A[0]
for i in range(1, len(A)):
    z = gcd(a, A[i])
    x, y = a // z, A[i] // z
    if x % 2 == y % 2 == 1:
        a = x*y*z
    else:
        print(0)
        break
else:
    print(round(((m+1)/a)))