n, m = map(int, input().split())
a = [0] + list(map(int, input().split())) + [0]
last = -1
s = 0
for i in range(n):
    if a[i] % 2:
        if last == -1:
            last = i
        s += a[i]
    else:
        if i - last >= m:
            print(s)
        last = -1
        s = 0