Help for greedy dd

this is code for greedy dd in python3.6. I have tried every input possible and answer shown is right. but when i submit practice my code,codedhef tells that it gives wrong answer. please help me with code and kindly tell the error

for _ in range(t):
max = 0
from itertools import cycle
n, k = map(int, input().split())
a = list(map(int, input().split()))
if (5 <= n <= 100001):
if (1 <= k <= n):
for index, *ans in zip(range(n + k), *[cycle(a)] * k):
# print(ans)
s = sum(ans)
if (s > max):
max = s