N,M = map(int,input().split())
A = list(map(int,input().split()))
count = 0
answer = 0

for i in range(N):
    if A[i] % 2 == 1:
        count += 1
        answer += A[i]
    else:
        if count >= M:
            print(answer)
        count = 0
        answer = 0
if count >= M :
    print(answer)