uses crt;
var a:integer;
begin
clrscr;
write('a='); readln(a);
if a mod 3=0 then writeln('so ban vua nhap chia het cho 3')
else writeln('so ban vua nhap khong chia het cho 3');
readln;
end.
uses crt;
var a:integer;
begin
clrscr;
write('a='); readln(a);
if a mod 3=0 then writeln('so ban vua nhap chia het cho 3')
else writeln('so ban vua nhap khong chia het cho 3');
readln;
end.