SGU 276 Andrew's Troubles

#include <iostream>
#include <cstdio>
using namespace std;
int s, n, ans;
int main() {
    cin >> s >> n;
    n -= s;
    if (n >= 30 * 60)   ans++;
    if (n >= 15 * 60)   ans++;
    if (n >= 5  * 60)   ans++;
    if (n > 0)   ans++;
    cout<<ans<<endl;
}