uses crt;
var a: array[1..100] of integer;
i,n: integer;
tbc: real;
begin
clrscr;
write ('nhap so phan tu: '); readln (n);
for i:=1 to n do
begin
write ('nhap phan tu thu ',i,': '); readln (a[i]);
tbc:=tbc+a[i];
end;
tbc:=tbc/n;
writeln ('gia tri trung binh: ',tbc);
readln;
end.