#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  int n, m, k;
  cin >> n >> m >> k;
  vector<vector<bool>> dp(n + 1, vector<bool>(k + 1));
  dp[0][0] = true;
  for (int i = 1; i <= n; i++) {
    for (int j = 0; j < m; j++) {
      int x;
      cin >> x;
      for (int u = 0; u <= k; u++) {
        if (u - x >= 0) if (dp[i - 1][u - x]) dp[i][u] = true;
      }
    }
  }
  for (int i = k; i > 1; i--) {
    if (dp[n][i]) {
      cout << k - i << '\n';
      return 0;
    }
  }
  cout << -1 << '\n';
  return 0;
}