program bai1;
var a:longint;
b:boolean;
begin
write('Nhap so: ');readln(a);
b:=false;
writeln(a,':');
if a<0 then writeln(' -La so nguyen am ')
else write('La so nguyen duong');
if a mod 3=0 then writeln('Chia het cho 3')
else writeln('Khong chia het cho 3');
if a>7 then writeln('Lon hon 7')
else write('Nho hon 7');
readln
end.