program de;
    var
    a:array[1..100,1..100] of byte;
    t,i,j,z,n:integer;
begin
   readln(n);
   z:=2;
   t:=0;
   if n=1 then write(1)
   else
   begin
   repeat
   for i:=1 to z-1 do
   if (z-i<=n) and (i<=n) then
   begin
   inc(t);
   a[i,z-i]:=t;
   end;
   inc(z);
   until z=n*n+1;
   for i:=1 to n do
   begin
   for j:=n downto 1 do
   write(a[i,j],' ');
   writeln;
   end;
   end;
end.

Check your program for the test 100
(answer is very strange :)