#include <iostream>
#include <cstdlib>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iostream>
#include <iomanip>
#include <deque>

int main()
{
    int n;
    std::deque<int> a;
    std::cin >> n;
    if(n == 0){
        std::cout << "0" << std::endl;
    }
    while(n != 0){
        a.push_front(n % 7);
        n = n / 7;
    }
    for(auto i = a.begin(); i != a.end(); i++){
        std::cout << *i;
    }
    std::cout << std::endl;
    return 0;
}