n, m = map(int, input().split())
a = list(map(int, input().split()))
l = 0
while l < n:
    s = 0
    r = l
    while r < n and a[r] % 2:
        s += a[r]
        r += 1
    if r - l >= m:
        print(s)
        l = r
    else:
        l += 1