#include<fstream>
using namespace std;
ifstream fin("generare.in");
ofstream fout("generare.out");

int a[21][1000],n,i,j,k,c,p;

int main()
{
	fin>>n;
	a[1][1]=1;
	for(i=2;i<=n;i++)
	{
		j=1;k=0;
		do
		{
			p=0;
			c=a[i-1][j];
			while(a[i-1][j]==c && a[i-1][j]!=0)
			{
				j++; p++;
			}
			k++;
			a[i][k]=c;
			k++;
		    a[i][k]=p;
			
		}
		while(a[i-1][j]!=0);
	}
	j=1;
	while(a[n][j]!=0) fout<<a[n][j++];
	fin.close();
	fout.close();
	return 0;
}