TINHTUOI C++

#include <bits/stdc++.h>
using namespace std;

int ns,nht,tuoi;
int main ()
{
    freopen("tinhtuoi.inp","r",stdin);
    freopen("tinhtuoi.out","w",stdout);
    cin>>ns>>nht;
    tuoi=nht-ns;
    cout<<"Tuoi cua ban la: "<<tuoi;
}