#include <iostream>

using namespace std;

int main()
{
    unsigned short int hourValue = 0;
    
    cout << "Введите час: "; 
    cin >> hourValue;
    
    switch(hourValue){
        case 8:
        case 9:
        case 10:
            cout << "1" << endl; break;
        case 11:
        case 12:
        case 13:
        case 14:
        case 15:
        case 16:
        case 17:
            cout << "2" << endl; break;
        case 18:
        case 19:
        case 20:
        case 21:
        case 22:
            cout << "3" << endl; break;
    }

    return 0;
}