#include<iostream>
#include<string>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<cstring>
#include<map>
#include<vector>
#include<queue>
#include<climits>
using namespace std;
typedef long long int ll;

int main(){

	ll n, ans;
	cin >> n;
	ll p=0, w=1;
	while(n){
		p+=(n%7)*w;
		w*=10;
		n/=7;
	}
	cout << p << endl;
  
  return 0;
}