uses crt;
var
a:array[1..20,1..20] of integer;
i,j,n:integer;
begin
randomize;
read(n);
for i:=1 to n do
begin
for j:=1 to n do
begin
a[i,j]:=random(101)-50;
write(a[i,j]:4);
end;
writeln;
end;
end.