N,M = map(int,input().split())
A = list(map(int,input().split()))
flag = False
c = 0
s = 0
for i in range(N):
    if A[i] % 2 == 1:
        flag = True
        c += 1
        s += A[i]
    else:
        if flag and c >= M:
            print(s)
        flag = False
        c = 0
        s = 0
if flag and c >= M:
    print(s)