#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;


int main(){
  int N, M, K;
  cin >> N >> M >> K;
  bitset<501> b;
  b[0] = true;
  rep(i,N){
    bitset<501> t;
    rep(j,M){
      int a;
      cin >> a;
      t |= b << a;
    }
    b = t;
  }

  int ret = -1;
  rep(i,K+1){
    if(b[i]) ret = i;
  }
  if(ret == -1) cout << -1 << endl;
  else cout << K-ret << endl;
  
  return 0;
}