#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

template<typename T>
vector<T> convert_base(T x, T base) {
    if (x == 0) return {0};
    vector<T> ret;
    while (x) {
        T r = x % base;
        if (r < 0) r -= base;
        x = (x - r) / base;
        ret.emplace_back(r);
    }
    reverse(ret.begin(), ret.end());
    return ret;
}

int main() {
    int n; cin >> n;
    for (int sept: convert_base(n, 7)) cout << sept;
    cout << endl;
    return 0;
}