// #include <bits/stdc++.h>
#include <fstream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iostream>

using namespace std;

#define nl '\n'

ifstream fin("plantatie.in");
ofstream fout("plantatie.out");

// ifstream fin("input.txt");
// ofstream fout("output.txt");

void solve()
{
    int n,q;
    fin>>n>>q;
    vector<vector<vector<int>>> a(n,vector<vector<int>>(n,vector<int>(int(log2(n)+1))));
    for(int i=0; i<n; i++){
        for(int j=0; j<n; j++){
            fin>>a[i][j][0];
        }
    }
    for(int d=1; d<=log2(n); d++){
        for(int i=0; i+(1<<d)-1<n; i++){
            for(int j=0; j+(1<<d)-1<n; j++){
                a[i][j][d]=max(max(a[i][j][d-1],a[i+(1<<(d-1))][j+(1<<(d-1))][d-1]),
                               max(a[i+(1<<(d-1))][j][d-1],a[i][j+(1<<(d-1))][d-1]));
            }
        }
    }
    for(int i=0; i<q; i++){
        int x,y,k;
        fin>>x>>y>>k;
        x--,y--;
        int logg=log2(k);
        fout<<max(max(a[x][y][logg],a[x+k-(1<<logg)][y+k-(1<<logg)][logg]),
              max(a[x+k-(1<<logg)][y][logg],a[x][y+k-(1<<logg)][logg]))<<nl;
    }
}

int main()
{
// #ifndef ONLINE_JUDGE
//     freopen("input.txt", "r", stdin);
//     freopen("output.txt", "w", stdout);
// #endif
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t=1;
    // int t;
    // cin >> t;
    for(int tt=1; tt<=t; tt++){
        // cout<<"#Case "<<t<<nl;
        solve();
    }
    return 0;
}