#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    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];
    ll low = 0;
    ll high = 2e9;
    if(k>=n+m) {
        cout << (int)1e9 << endl;
        return 0;
    }
    while(high-low>1) {
        ll mid = (high+low)/2;
        vector<vector<ll>> dp(n+1, vector<ll>(m+1, n*m));
        if(a[0][0]<mid) dp[0][0] = 1;
        else dp[0][0] = 0;
        rep(i,n)rep(j,m) {
            if(i+1<n) dp[i+1][j] = min(dp[i+1][j], dp[i][j]+(a[i+1][j]<mid));
            if(j+1<n) dp[i][j+1] = min(dp[i][j+1], dp[i][j]+(a[i][j+1]<mid));
        }
        if(dp[n-1][m-1]<=k) low = mid;
        else high = mid;
    }
    cout << low << endl;
    return 0;
}