N, M = map(int, input().split())
counter = 0
sum = 0
A = list(map(int,input().split()))
for i in range(N):
    if A[i] % 2 != 0:
        counter += 1
        sum += A[i]
    else:
        if counter >= M:
            print(sum)
        counter = 0
        sum = 0
if sum != 0:
    print(sum)