#include<iostream>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);++i)
#define chmax(a,b) a=max(a,b)
int N,D,K,A[500],C[500];
long dp[501][501],ndp[501][501];
int main(){
	cin>>N>>D>>K;
	rep(i,N)cin>>A[i];
	rep(i,N)cin>>C[i];
	rep(i,D+1)rep(j,K+1) dp[i][j]=-1e18;
	dp[0][0]=0;
	rep(k,N){
		rep(i,D+1)rep(j,K+1) ndp[i][j]=-1e18;
		rep(i,D+1)rep(j,K+1){
			chmax(ndp[i][j],dp[i][j]);
			if(i+1<=D) chmax(ndp[i+1][min(K,j+C[k])],dp[i][j]+A[k]);
		}
		swap(dp,ndp);
	}
	long ans=dp[D][K];
	if(ans==-1e18) cout<<"NO"<<endl;
	else cout<<ans<<endl;
}