#include <fstream>
using namespace std;
ifstream cin("plantatie.in");
ofstream cout("plantatie.out");
int r[10][505][505], exp[505], n, m, i, j, p, lat, i1, i2, j1, j2, len, k, l;
int main(){
    cin>>n>>m;
    for(i=1;i<=n;i++){
        for(j=1;j<=n;j++){
            cin>>r[0][i][j];
        }
    }
    for(p=1,lat=2;lat<=n;p++,lat*=2){
        for(int i1=1; i1<=n-lat+1; i1++){
            for(int j1=1; j1<=n-lat+1; j1++){
                i2=i1+(lat>>1);
                j2=j1+(lat>>1);
                r[p][i1][j1]=max(r[p-1][i1][j1], max(r[p-1][i2][j1], max(r[p-1][i1][j2], r[p-1][i2][j2])));
            }
        }
    }
    exp[1]=0;
    for(i=2;i<=n;i++){
        exp[i]=exp[i/2]+1;
    }
    for(i=1;i<=m;i++){
        cin>>i1>>j1>>l;
        k=exp[l];
        len=(1<<k);
        i2=i1+l-len;
        j2=j1+l-len;
        cout<<max(max(r[k][i1][j1], r[k][i1][j2]), max(r[k][i2][j1], r[k][i2][j2]));
        cout<<"\n";
    }
}