la 2 luc cung dat len 1 vat co nam tren 1 duong thang co chieu nguoc nhau

sach dalen ban chiu 2 luc

a

dieu khien con ng

program tenct;

uses crt;

begin

        clrscr;

         writeln('Truong THCSVO THI SAU');

          Writeln('Em ten la: NGUYEN VAN A');

          readln;

end.