#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define coutf(f) cout << fixed << setprecision(f)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()

int main() {
	int n;
	cin >> n;
	if (n == 0) {
		cout << 0 << endl;
		return 0;
	}
	stack<int> st;
	while (n > 0) {
		st.push(n % 7);
		n /= 7;
	}
	while (!st.empty()) {
		cout << st.top();
		st.pop();
	}
	cout << endl;
	return 0;
}