cx.cpp

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*/                              
#include<bits/stdc++.h>
using namespace std;
 
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define LL long long 
#define mod 1000000007 
#define FOR(i, j, k) for (int i=j ; i<k ; i++)
#define ROF(i, j, k) for (int i=j ; i>=k ; i--) 
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false); debug("%s time : %.4fs", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))

const long long INF = 1e18;
const long long MAX = 1e5+10;
LL cost =INF;
void f(vector<vector<LL>>c,int n,vector<LL>&d,vector<LL>dn,LL cp,int x){
    bool ch = true;
    FOR(i,0,dn.size()) if(dn[i]<x) ch=false;
    if(ch)  cost = min(cost,cp); 
    if(n<0) return; 
    vector<LL>xx=dn; 
    FOR(i,0,dn.size()) xx[i]+=c[n][i];
    f(c,n-1,d,xx,cp+d[n],x) ;  f(c,n-1,d,dn,cp,x);
}
int main(){
    fastio;
    int t=1; //cin>>t;
    while(t--){
        int n,m,x,r; cin>>n>>m>>x;
        vector<vector<LL>>u(n,vector<LL>(m)); vector<LL>cp(n),dn(m,0);
        FOR(i,0,n){
            cin>>cp[i];
            FOR(j,0,m) cin>>u[i][j];
        }
        f(u,n-1,cp,dn,0,x);
        if(cost==INF) cout<<-1;
        else cout<<cost;
    }
}