#include <fstream>
#include <math.h>
using namespace std;
ifstream f("fact.in");
ofstream g("fact.out");
long int N,P,a,numar=2;
int nr,ok;
int main()
{
    f>>P;
    a=P/10;
    ok=P%2==1;
    numar=2;
    nr++;
    while(a)
        {
            nr++;
            numar=numar*10+1;
            a/=10;
        }
    while(numar)
        {
            N+=(P/numar)*pow(10,nr);
            nr--;
            P%=numar;
            numar/=10;
        }
    if(ok)
      N=N+5;
    g<<N;
    f.close();
    g.close();
}