#include<bits/stdc++.h>
using namespace std;
#define rep(i,x,y) for(int i=x;i<y;i++)
#define range(a) (a).begin(),(a).end()
#define print(A,n) rep(i,0,n){cout<<(i ? " ":"")<<A[i];}cout<<endl;
#define pprint(A,m,n) rep(j,0,m){print(A[j],n);}
const long mod=1e9+7;
const int size=1e5;
const int INF=1e9;
int main(){
	int N,M,K;cin>>N>>M>>K;
	int A[N][M];
	rep(i,0,N){
		rep(j,0,M) cin>>A[i][j];
	}
	int dp[N+1][K+1]={};
	rep(i,1,N+1)rep(k,0,K+1) dp[i][k]=-1;
	rep(i,1,N+1)rep(k,0,K+1){
		int res=-1;
		rep(j,0,M){
			if(k<A[i-1][j]) continue;
			if(dp[i-1][k-A[i-1][j]]==-1) continue;
			res=max(res,dp[i-1][k-A[i-1][j]]+A[i-1][j]);
		}dp[i][k]=res;
	}
    //pprint(dp,N+1,K+1);
    if(dp[N][K]==-1) cout<<-1<<endl;
    else cout<<K-dp[N][K]<<endl;
}