#include<iostream>
#include<string>
#include<algorithm>
#include<functional>
#include<vector>
#include<set>
#include<queue>
#include<list>
#include<stdio.h>
#include<stdlib.h>
#include<map>

#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()

using namespace std;

int main() {
	
	long long N;

	cin >> N;

	int r = N % 7;

	int q = 1;

	
	while (N >= q * 7) {
		q *= 7;
	}

	int a = -1;
	while (N>0 && q!=0) {
		a = N / q;

		N = N%q;

		q /= 7;

		cout << a;
	}

	if (r == 0) {
		cout << 0 << endl;
	}

	

}