program tbc;
uses crt;
var A:array[1..10000] of integer;
n,i:integer;
s:longint;
begin
clrscr;
write('Nhap so luong phan tu N: '); readln(n);
writeln('NHAP GIA TRI TUNG PHAN TU CUA MANG');
s:=0;
for i:=1 to n do
begin
write('Phan tu thu ',i,'= ');
readln(A[i]);
s:=s+A[i];
end;
write('trung binh cong cua day so la: ',s/n:2:2);
readln
end.