text: ﻿#include <iostream>
  #include"mylib.h"
  
  using namespace std;
  
  int main(int argc, char* argv[])
  {
  	cout << "2.\n";
  	{
  		int n = 0;
  		cin >> n;
  		cout << task2(n) << "\n\n";
  	}
  	
  	cout << "3.\n";
  	{
  		int n = 0;
  		cin >> n;
  		task3(n);
  	}
  
  	return EXIT_SUCCESS;
  }