program ct;
uses crt;
var i,n,d:integer;
begin clrscr;
write('Nhap so n: '); readln(n);
if n mod 2=0 then writeln(n,' la so chan')
else writeln(n,' la so le');
d:=0;
for i:=1 to n do
if n mod i =0 then d:=d+1;
if d=2 then writeln(n,' la so nguyen to')
else writeln(n,' khong la so nguyen to');
readln;
end.
Học tốt!