#include <iostream>

using std::cout;
using std::cin;

int main()
{
  int Ruble = 0;
  
  cout << "Введите количество денег: ";
  cin >> Ruble;
  
  if (Ruble % 10 == 0 || Ruble % 10 >= 5 || (Ruble / 10) % 10 == 1){
    cout << Ruble << " рублей";
    }else if (Ruble % 10 == 1){
    cout << Ruble << " рубль";
    }else {
    cout << Ruble << " рубля";
    }
}