#include <fstream>
using namespace std;
string file = "plantatie";
ifstream cin (file + ".in");
ofstream cout (file + ".out");
const int N = 500;
int dp[9][N+1][N+1], np(0),p[9];
int main ()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m,x,k,i,j,e,st;
    cin >> n >> m;
    p[np++] = 1;
    for (i=2; i<=n; i=i<<1)
    {
        p[np++] = i;
    }
    for (i=1; i<=n; i++)
    {
        for (j=1; j<=n; j++)
        {
            cin >> dp[0][i][j];
        }
    }
    for (k=1; k<np; k++)
    {
        for (i=p[k]; i<=n; i++)
        {
            for (j=p[k]; j<=n; j++)
            {
                dp[k][i][j] = max(max(dp[k-1][i][j],dp[k-1][i-p[k-1]][j]),max(dp[k-1][i][j-p[k-1]],dp[k-1][i-p[k-1]][j-p[k-1]]));
            }
        }
    }
    while (m--)
    {
        cin >> i >> j >> k;

        st = 1, e = np-1;
        while (st <= e)
        {
            int mid = (st+e)/2;
            if (p[mid] <= k)
            {
                st = mid+1;
            }
            else
            {
                e = mid-1;
            }
        }
        x = p[e];
        cout << max(max(dp[e][i+x-1][j+x-1],dp[e][i+k-1][j+x-1]),max(dp[e][i+x-1][j+k-1],dp[e][i+k-1][j+k-1])) << '\n';
    }
}