n,m = map(int, input().split())
list = list(map(int,input().split()))
cnt = 0
ans = 0
for e in list:
    if e % 2 == 1:
        cnt = cnt +1
        ans = ans + e
    else:
        if cnt >= m:
            print(ans)
        cnt=0
        ans=0        

if cnt >= m:
    print(ans)