program shizik1;
uses crt;
var n,i,j,max:integer;
    a:array[1..20,1..20] of integer;
begin
clrscr;
write('n=');readln(n);
randomize;
for i:=1 to n do
  begin
    for j:=1 to n do
      begin
        a[i,j]:=random(20);
        write(a[i,j]:3);
      end;
  writeln;
  end;
readln;
max:=a[2,1];
for i:=2 to n do
for j:=1 to i-1 do
if a[i,j]>max then
  begin
    max:=a[i,j];
  end;
write('max=',max);
readln;
end.