int f;
    cin >> f;
    int obs = 255;
    /*
    5 hours = 300 minutes
    all time = 300 minutes - 45 minutes(for f tasks)
    */
    int r = 12 - f;
    // tasks after first hour
    int ans = 45 * r;
    // time for solution
    if (ans <= obs) cout << "YES" << endl;
    else cout << "NO" << endl;

Edited by author 15.05.2020 17:20

Edited by author 15.05.2020 17:20

if (5 + f >= 12)
cout << "YES";
else cout << "NO";



cuz (60 * 4) // 45 = 5
he can solve 5 tasks in last 4 hours

Edited by author 11.01.2021 13:20

Edited by author 11.01.2021 13:20