n,m=map(int,input().split())
a=list(map(int,input().split()))
ans=0
odd =0
for i in a:
    if i%2 == 0:
        if ans>0 and odd >= m:
            print(ans)
        ans=0
        odd=0
    else:
        ans+=i
        odd+=1
if odd >= m and ans!=0:
    print(ans)