I had run this code on idle and it works but it doesn’t on codechef(Python3.5), it shows wrong answer(It is the question in practice->beginner->The Great Run)-
t=int(input())
c=0
while(t>0):
(n,k)=map(int,input().split())
d=list(map(int,input().split()))
for i in range(0,n-k+1):
sm=0
for j in range(i,(i+k)):
sm+=d[j]
if(sm>c):
c=sm
print (c)
t-=1