n,m=map(int,input().split())
a=list(map(int,input().split()))
cnt=0
ans=0
for i in range(len(a)):
  if a[i]%2==1:
    cnt+=1
    ans+=a[i]
  else:
    if cnt>=m:
      print(ans)
    cnt=0
    ans=0
if cnt>=m:
  print(ans)