n, m = map(int, input().split())
A = list(map(int, input().split()))

cnt = 0
cum = 0
prev = 0
for i in range(n):
    if i==0:
        if A[i]%2==1:
            cnt += 1 
            cum += A[i]
    else:
        if A[i]%2==0:
            if cnt>=m:
                print(cum)
            cum = 0
            cnt = 0
        elif A[i]%2==1:
            cnt += 1
            cum += A[i]
            
if cnt>=m:
    print(cum)