n,m=[int(j) for j in input().split()]
a=[int(j) for j in input().split()]
cnt=0
tmp=0
for i in a:
    if i%2==1:
        cnt+=1
        tmp+=i
    else:
        if cnt>=m:
            print(tmp)
        cnt=0
        tmp=0
if cnt>=m:
    print(tmp)