#include<iostream>
#include<cmath>
using namespace std;

int main(){
    bool flag=false;
    long long int N,i,a,num;
    cin >> N;
    for(i=15;i>=0;i--){
        num = pow(7,i);
        a = N / num;
        N = N % num;
        if(a>0) flag = true;
        if(flag)    cout << a;
    }  
    if(!flag)   cout << 0; 
    cout << endl;
    return 0;
}