#include <bits/stdc++.h>
using namespace std;

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

int rmq[13][505][505], e[505], n;

int main()
{
    int i, j, k, q, L;
    fin >> n >> q;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= n; j++)
            fin >> rmq[0][i][j];
    for (i = 2; i <= n; i++)
        e[i] = 1 + e[i / 2];
    for (k = 1; k <= e[n]; k++)
    {
        L = (1 << k);
        for (i = 1; i <= n - L + 1; i++)
            for (j = 1; j <= n - L + 1; j++)
                rmq[k][i][j] = max({rmq[k - 1][i][j], rmq[k - 1][i + L / 2][j],
                                    rmq[k - 1][i][j + L / 2], rmq[k - 1][i + L / 2][j + L / 2]});
    }
    while (q--)
    {
        fin >> i >> j >> k;
        L = e[k];
        fout << max(rmq[L][i][j], rmq[L][i + k - (1 << L)][j + k - (1 << L)]) << "\n";
    }
    return 0;
}