He used to work 16 hours a day when he was young.

Uses crt;

Var a,b,c,d,e,g:longint;

Begin

Clrscr;

writeln(so thu nhat la);readln(a);

writeln(so thu nhat la);readln(b);

writeln(so thu nhat la);readln(c);

writeln(so thu nhat la);readln(d);

writeln(so thu nhat la);readln(e);

g:=a+b+c+d+e;

Writeln('Tong scua 5 so la',g);

readln;

end.

Chúc mừng mn nha!!!!

But

 so

 so

 but

 and

and