program QUATANG;
uses crt;
var n,i,j,k,dem:word;
tb,t:real;
a:array[1..500] of longint;
f:text;
str:string;
begin
clrscr;
writeln;
assign(f,'D:\QUATANG.INP');
reset(f);
readln(f,n);
for i:=1 to n do read(f,a);
close(f);
writeln('du lieu nhap vao tep...