Var a:array[1..200] of real;
i,n,dem:integer;
s,tbc:real;
Begin
Write('Nhap so luong phan tu n = ');readln(n);
s:=0;
For i:=1 to n do
Begin
Write('Nhap phan tu thu ',i,' = ');readln(a[i]);
s:=s+a[i];
End;
tbc:=s/n;
Write('Trung binh cong la ',tbc:10:2);
Readln;
End.