#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < (n); i++)
#define repr(i, n) for (int i = (n) - 1; i >= 0; i--)
#define rep2(i, l, r) for (int i = (l); i < (r); i++)
#define rep2r(i, l, r) for (int i = (r) - 1; i >= (l); i--)
#define range(a) a.begin(), a.end()

using namespace std;
using ll = long long;

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(15);
  int N, M, K; cin >> N >> M >> K;
  vector<vector<int>> A(N, vector<int>(M));
  rep(i, N) rep(j, M) cin >> A[i][j];
  vector<bool> dp0(K + 1);
  dp0[0] = true;
  rep(i, N) {
    vector<bool> dp1(K + 1);
    rep(j, K + 1) rep(k, M) if (dp0[j]) {
      dp1[j + A[i][k]] = true;
    }
    dp0 = dp1;
  }
  repr(i, K + 1) if (dp0[i]) {
    cout << K - i << endl;
    return 0;
  }
  cout << -1 << endl;
}