using System;
class MainClass {
  public static void Main (string[] args) {
    int num = Convert.ToInt32(Console.ReadLine());
    int arrayLength = (int) Math.Log(num,2) + 1; // symbols in number in binary format
    int[] array = new int[arrayLength]; //array to hold number in binary format
    int counter = 0;
    while(num > 0)
    {
      array[counter++] = num % 2;
      num = num / 2;
    }
    long binaryNum = 0; //variable to hold number in binary format
    for(int i = arrayLength-1 ; i >=0; --i)
      binaryNum = binaryNum*10 + array[i];

    Console.WriteLine(binaryNum);
  }
}