uses crt;
var a: array[1..100] of integer;
i,n,s: integer;
tbc: real;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
write ('nhap phan tu thu ',i,': '); readln (a[i]);
s:=s+a[i];
end;
tbc:=s/n;
writeln ('tong la: ',s);
writeln ('trung binh cong la: ',tbc:1:2);
readln;
end.