#include <cmath>

#define notlocal 1

#if !notlocal

#include <iostream>
#define fin std::cin
#define fout std::cout

#else

#include <fstream>
std::ifstream fin("plantatie.in");
std::ofstream fout("plantatie.out");

#endif

using namespace std;

const int NMAX = 500;

int v[NMAX + 5][NMAX + 5];
int rmq[NMAX + 5][NMAX + 5][9];

int main()
{
    int n, m;
    fin >> n >> m;
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < n; ++j)
        {
            fin >> v[i][j];
            std::cout << v[i][j] << ' ' << i << ' ' << j << '\n';
            rmq[i][j][0] = v[i][j];
        }
    }

    for (int i = n - 1; i > -1; --i)
    {
        for (int j = n - 1; j > -1; --j)
        {
            for (int l = 1; max(i, j) + (1 << l) < n + 1; ++l)
            {
                rmq[i][j][l] = max(max(max(rmq[i][j][l - 1], rmq[i + (1 << (l - 1))][j][l - 1]), rmq[i][j + (1 << (l - 1))][l - 1]), rmq[i + (1 << (l - 1))][j + (1 << (l - 1))][l - 1]);
            }
        }
    }
    int x, y, z, l;
    for (int i = 0; i < m; ++i)
    {
        fin >> x >> y >> z;
        x--;
        y--;
        l = log2(z);
        fout << max(rmq[x][y][l], max(rmq[x + z - (1 << l)][y][l], max(rmq[x][y + z - (1 << l)][l], rmq[x + z - (1 << l)][y + z - (1 << l)][l]))) << '\n';
    }
    return 0;
}