#include <fstream>
using namespace std;
ifstream cin("plantatie.in");
ofstream cout("plantatie.out");
int i, j, n, m, x, st, dr, exp, putere, L, val, p, i1, j1;
int r[17][502][502], e[502];
int main() {
    cin>>n>>m;
    for(i=1;i<=n;i++){
        for(j=1;j<=n;j++){
            cin>>x;
            r[0][i][j]=x;
        }
    }
    for(p=1;(1<<p)<=n;p++){
        for(i=1;i<=n;i++){
            for(j=1;j<=n;j++){
                putere=(1<<p-1);
                r[p][i][j]=max(max(r[p-1][i][j], r[p-1][i+putere][j]), max(r[p-1][i][j+putere], r[p-1][i+putere][j+putere]));
            }
        }
    }
    e[1]=0;
    for(i=2;i<=n;i++){
        e[i]=e[i/2]+1;
    }
    for(i=1;i<=m;i++){
        cin>>i1>>j1>>L;
        exp=e[L];
        putere=(1<<exp);
        cout<<max(max(r[exp][i1][j1], r[exp][i1+L-putere][j1]), max(r[exp][i1][j1+L-putere], r[exp][i1+L-putere][j1+L-putere]))<<"\n";
    }



}