#include<bits/stdc++.h>
int main(){
    int n;std::cin>>n;
    if(!n)std::cout<<0<<std::endl,exit(0);
    std::vector<int>a;
    for(;n;n/=7)a.push_back(n%7);
    for(;!a.empty();a.pop_back())std::cout<<a.back();
    std::cout<<std::endl;
}