program trung_binh;
uses crt;
type kmang=array[1..1000] of integer;
var a:kmang;
n,i:integer;
{---Ham---}
function tbc(A:kmang; n:integer):real;
var j,t:integer;
begin
t:=0;
for j:=1 to n do t:=t+A[j];
tbc:=t/n;
end;
{---Chuong-trinh-chinh---}
begin
clrscr;
write('Nhap N: '); readln(n);
for i:=1 to n do
begin
write('A[',i,']= '); readln(A[i]);
end;
write('Trung binh la: ',tbc(A,n):0:3);
readln;
end.