#include <iostream>
using namespace std;
int main()
{
    int heure, minute, seconde;
    do
    {
    cout << "Saisissez une heure" << endl << endl;
    cin >> heure;
    cout << endl << endl;
    } while (heure < 0 || heure > 24);

    do
    {
    cout << "Saisissez des minutes" << endl << endl;
    cin >> minute;
    cout << endl << endl;
    } while (minute < 0 || minute > 60);

    do
    {
    cout << "Saisissez des secondes" << endl << endl;
    cin >> seconde;
    cout << endl << endl;
    } while (seconde < 0 || seconde > 60);

    if (heure == 0 && minute == 0 && seconde == 0)
    {
        cout << "Non." << endl << endl << endl;
    }
}