#include <bits/stdc++.h>
using namespace std;
#define FOR(i, n) for(int i = 0; i < (n); i++)
#define MEM(a, x) memset(a, x, sizeof(a))
#define ALL(a) a.begin(), a.end()
#define UNIQUE(a) a.erase(unique(ALL(a)), a.end())
typedef long long ll;

ll n;

int main(int argc, char const *argv[]) {
	cin >> n;
	ll a[100];
	a[0] = 7;
	FOR(i, 10) a[i+1] = a[i] * 7;
	vector<ll> v;
	for (int i = 10; i >= 0; i--) {
		v.push_back(n/a[i]);
		n %= a[i];
	}
	v.push_back(n);
	int s = 0;
	FOR(i, v.size()) {
		if (!v[i]) s++;
		else break;
	}
	if (s == v.size()) s--;
	for (int i = s; i < v.size(); i++) cout << v[i];
	cout << endl;
	return 0;
}