program TB;
uses crt;
var A:array [1..500] of integer;
n,i: integer;
TB: real;
Begin
clrscr;
write('Nhap n: '); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(A[i]);
TB:=TB+A[i];
end;
TB:=TB/n;
write('Trung binh ',n,' so vua nhap = ',TB:2:1);
readln
End.