#include<bits/stdc++.h>
using namespace std;

int main(){
    int N,p=1,tmp;
    queue<int> s;

    cin >> N;
    while(N/p/7!=0) p*=7;
    while(p!=0){
        tmp=N/p;
        N=N%p;
        p/=7;
        s.push(tmp);
    }
    while(!s.empty()){
        cout << s.front();
        s.pop();
    }
    cout << endl;

    return 0;
}