#include <iostream>
#include <cstdio>

using namespace std;

typedef long long LL;

const int N = 21;

int n;
LL pw[N];
string s;

int main() {
    // freopen("base7.in", "r", stdin);
    // freopen("base7.out", "w", stdout);

    scanf("%d", &n);

    if (n == 0) {
        puts("0");
        return 0;
    }
    pw[0] = 1LL;
    for (int i = 1; i < N; ++i) pw[i] = pw[i - 1] * 7;
    
    bool ok = false;
    for (int i = N - 1; i >= 0; --i) {
        if (ok) {
            s += n / pw[i] + '0';
            n %= pw[i];
        } else {
            if (n >= pw[i]) {
                ok = true;
                s += n / pw[i] + '0';
                n %= pw[i];
            }
        }
    }

    cout << s << endl;
    
    return 0;
}