#include <bits/stdc++.h>

using namespace std;

typedef unsigned long long ull;
typedef long long ll;

int main(){
	ll n;
	cin >> n;
	if(n==0){
		cout << 0 << endl;
		return 0;
	}
	
	vector<int> v;
	while(n>0){
		v.push_back(n%7);
		n/=7;
	}
	for(int i=v.size()-1; i>=0; i--) cout << v[i];
	cout << endl;
	return 0;
}