def main():
    l = list(map(int, input().split(" ")))
    n = l[0]
    m = l[1]
    p = list(map(int, input().split(" ")))
    u = 0
    x = 0
    for v in p:
        if v % 2 != 0:
            x += 1
            u += v
        elif v % 2 == 0:
            if x >= m:
                print(u)
            x = 0
            u = 0
    if x >= m:
        print(u)

main()