Program Tinh_tong;
Uses crt;
Var a:array[1..100] of real;
       n,i,s:integer;
BEGIN
 clrscr;
 write('Nhap vao n phan tu: '); readln(n);
 for i:=1 to n do
  begin
    write('Nhap vao phan tu thu ',i,': '); readln(a);
  end;
s:=0;
for i:=1 to n do
 begin
   if a>0 then s:=s+a;
 end;
write('Tong...