#include <iostream>
using namespace std;
 
int main(){
    int N;
    cin >> N;
    if(N == 0){
        cout << 0 << endl;
    }
    string ans = "";
    while(N != 0){
        ans = to_string(N % 7) + ans;
        N /= 7;
    }
    cout << ans << endl;
}