# include <algorithm>
using namespace std;

# define DIM 501
# define LOG 10

int n, m, pow[ DIM ], sol[ DIM ][ DIM ][ LOG ];

inline int max ( int x, int y ) {

    if ( x > y )
        return x;

    return y;
}

void calc_sol () {

    int i, j, k;

    for ( k = 1; ( 1 << k ) <= n; ++ k )
        for ( i = 1; i <= n; ++ i ) if ( i + ( 1 << ( k - 1 ) ) <= n )
            for ( j = 1; j <= n; ++ j ) if ( j + ( 1 << ( k - 1 ) ) <= n )
                sol[ i ][ j ][ k ] = max ( max ( sol[ i ][ j ][ k - 1 ], sol[ i ][ j + ( 1 << ( k - 1 ) ) ][ k - 1 ] ), max ( sol[ i + ( 1 << ( k - 1 ) ) ][ j ][ k - 1 ], sol[ i + ( 1 << ( k - 1 ) ) ][ j + ( 1 << ( k - 1 ) ) ][ k - 1 ] ) );
}

void calc_pow () {

    int i, p;

    p = 0;
    for ( i = 1; i <= n; ++ i ) {

        if ( ( 1 << ( p + 1 ) ) == i )
            ++ p;
        pow[ i ] = p;
    }
}

void solve () {

    int i, j, k, d, p, x, y;

    scanf ( "%d%d", &n, &m );
    for ( i = 1; i <= n; ++ i )
        for ( j = 1; j <= n; ++ j )
            scanf ( "%d", &sol[ i ][ j ][ 0 ] );
    calc_sol ();
    calc_pow ();
    for ( i = 0; i < m; ++ i ) {

        scanf ( "%d%d%d", &x, &y, &k );
        p = pow[ k ];
        d = k - ( 1 << pow[ k ] );
        printf ( "%d\n", max ( max ( sol[ x ][ y ][ p ], sol[ x ][ y + d ][ p ] ), max ( sol[ x + d ][ y ][ p ], sol[ x + d ][ y + d ][ p ] ) ) );
    }

}

int main () {

    freopen ( "plantatie.in", "r", stdin );
    freopen ( "plantatie.out", "w", stdout );

    solve ();

    return 0;
}