#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
using namespace std;
const int MAX = 1000000000;
int main() {
  cin.tie(0); cout.tie(0);
  ios::sync_with_stdio(false);
  int N, M, K;
  cin >> N >> M >> K;
  vector<vector<int>> A(N, vector<int>(M));
  for(int i = 0; i < N; i++) {
    for(int j = 0; j < M; j++) {
      cin >> A[i][j];
    }
  }
  if(K >= N + M - 1) {
    cout << MAX << '\n';
  } else {
    int ok = 1, ng = MAX + 1;
    while(ng - ok > 1) {
      int mid = (ok + ng) >> 1;
      vector<vector<int>> dp(N, vector<int>(M, MAX));
      dp[0][0] = A[0][0] < mid;
      for(int i = 0; i < N; i++) {
        for(int j = 0; j < M; j++) {
          if(i > 0) {
            dp[i][j] = min(dp[i][j], dp[i - 1][j] + (A[i][j] < mid));
          }
          if(j > 0) {
            dp[i][j] = min(dp[i][j], dp[i][j - 1] + (A[i][j] < mid));
          }
        }
      }
      if(dp.back().back() <= K) {
        ok = mid;
      } else {
        ng = mid;
      }
    }
    cout << ok << '\n';
  }
  return 0;
}