program CTTTB;
uses crt;
var TB,x:real; n,y: integer;
begin
Write('Hay nhap so so thuc ban can tinh TB'); Readln(n);
for y:=1 to n do
begin Write('Nhap so thu',y);Readln(x);
TB:=TB+x;
end;
TB:=TB/n;
Writeln('Trung binh cong cua',n,' so nhap vao tu ban phim la',TB);
Readln;
End.