#include <bits/stdc++.h>
using namespace std;

int main() {
    long long N;
    int a=0;
    cin>>N;
    N--;
    vector<short> A;
    if(N>=5){
        while(N>=5){
            a=1;
            A.push_back(N%5);
            N=N/5;
        }     
    }
    cout<<N*2;
    if(a=1){
        a=A.size();
        for(int i=0;i<a;i++){
            cout<<A[a-i-1]*2;
        }
    }
}

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