#include <iostream>
#include <fstream>
using namespace std;
long long n,cop,copp,p=1,i;
int main()
{
    ifstream f ("biti.in");
    ofstream r ("biti.out");
    f>>n;
    while (n>0)
    {
        cop=n%2*p+cop;
        p=p*10;
        n=n/2;
    }
    copp=cop;
    while (copp>0)
    {
        i++;
        copp=copp/10;
    }
    r<<i;
    r<<cop;
    return 0;

}