var v:array[1..125,1..125] of 1..1000000000;
    i,j,m,n,l,k,a,b,max:longint;
    f,g:text;
begin
assign(f,'plantatie.in');
assign(g,'plantatie.out');
reset(f);
rewrite(g);
readln(f,n,m);
for i:=1 to n do begin
for j:=1 to n do
read(f,v[i,j]);
end;
for l:=1 to m do begin
max:=-2000000000;
readln(f,a,b,k);
for i:=a to a+k-1 do
for j:=b to b+k-1 do
if v[i,j]>max then max:=v[i,j];
writeln(g,max);
end;
close(f);
close(g);
end.