#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define FORR2(x,y,arr) for(auto& [x,y]:arr)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
template<class T> bool chmax(T &a, const T &b) { if(a<b){a=b;return 1;}return 0;}
template<class T> bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;}
//-------------------------------------------------------


int N,D;
ll K;
ll dp[555][555];
ll A[555],C[555];
void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>N>>D>>K;
	FOR(i,N+1) FOR(j,K+1) dp[i][j]=-1LL<<60;
	FOR(i,N) cin>>A[i];
	FOR(i,N) cin>>C[i];
	
	dp[0][0]=0;
	FOR(i,N) {
		for(x=N-1;x>=0;x--) FOR(y,K+1) chmax(dp[x+1][min(y+C[i],K)],dp[x][y]+A[i]);
	}
	
	ll ret=dp[D][K];
	if(ret<-1LL<<59) {
		cout<<"No"<<endl;
	}
	else {
		cout<<ret<<endl;
	}
	
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}