N, M = map(int, input().split())
A = list(map(int, input().split()))
s = 0
j = 0
for i in A:
    if i % 2 == 0:
        if j >= M:
            print(s)
        s = 0
        j = 0
    else:
        s += i
        j += 1
if j >= M:
    print(s)