#include<stdio.h>
int main()
{long a[501][501],i,j,k,n,m,max,linie,coloana,pi,pj,ceva;
FILE *f=fopen("plantatie.in","r");
FILE *g=fopen("plantatie.out","w");
fscanf(f,"%ld %ld",&n,&m);
for (i=1;i<=n;i++) for (j=1;j<=n;j++) fscanf(f,"%d",&a[i][j]);
for (ceva=1;ceva<=m;ceva++)
{
  fscanf(f,"%ld %ld %ld",&i,&j,&k);
	max=0;
     for (linie=i;linie<=k+i-1; linie++)
	for (coloana=j;coloana<=k+j-1;coloana++)
		if (a[linie][coloana]>max)max=a[linie][coloana];
     fprintf(g,"%ld\n",max);}
fclose(f);
fclose(g);
return 0;}