n, m = map(int, input().split())
alst = list(map(int, input().split()))
cnt = 0
tot = 0
for a in alst:
    if a % 2 == 1:
        cnt += 1
        tot += a
    else:
        if cnt >= m:
            print(tot)
        cnt = 0
        tot = 0
        
if cnt >= m:
    print(tot)