#include <stdio.h>
#include <algorithm>
#include <vector>
#include <deque>
#include <string>
#include <iostream>
using namespace std;
using ll = long long;

void solve();
int main() {
	solve();
#ifdef DBG
	while (true);
#endif
}

//499
void solve() {
	int n;
	scanf("%d", &n);
	vector<int> v;
	while (n) {
		v.push_back(n % 7);
		n /= 7;
	}
	while (!v.empty()) {
		printf("%d", v.back());
		v.pop_back();
	}
	printf("\n");
}