#include <bits/stdc++.h>

using namespace std;
int a[1000000];

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int m, n, S;
  cin >> m >> n >> S;
  for (int i = 0; i < m * n; i++)
    cin >> a[i];

  sort(a, a + m * n);

  int l = 0, r = m * n - 1;
  int cur_max = -1;
  while (l < r) {
    if (a[l] + a[r] > S)
      r--;
    else {
      cur_max = max(cur_max, a[l] + a[r]);
      l++;
    }
  }
  cout << cur_max << '\n';
}