#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;
#ifdef _WIN32
#include <Windows.h>
#endif

int main()
{
    int n;
    cin >> n;
    string s = "";
    while (n){
        int t;
        s = to_string(n%7) + s;
        n /=7;
    }
    cout << s << endl;
}