#include <math.h>
#include <ctype.h>
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, n) for (int i = a; i < n; i++)
#define REP(i, n) for(int i = 0; i < n; i++)
struct omt{omt(){ios::sync_with_stdio(false);cin.tie(0);}}star;

int main(){
    int n;
    cin >> n;

    vector<int> A;
    while(1){
        if(n >= 7){
            A.push_back(n % 7);
            n /= 7;
        }else{
            A.push_back(n);
            break;
        }
    }
    reverse(A.begin(), A.end());
    REP(i, A.size()){
        if(i != A.size() - 1) cout << A[i];
        else cout << A[i] << endl;
    }


    return 0;
}