program ct;
uses crt;
var i,n,s:integer;tbc:real;
A:array[1..100] of integer;
begin
clrscr;
write('nhap n:=');readln(n);
for i:=1 to n do
begin
write('nhap mang A[',i,']:=');readln(A[i]);
end;
s:=0;
for i:=1 to n do
begin
s:=s+A[i];
tbc:=s/n;
end;
writeln('trung binh cong la:',tbc:4:2);
readln
end.
