#include<iostream>
#include<string>
#include<iomanip>
#include<vector>
using namespace std;

int main(){
  int x,count=1,calc=1;
  std::vector<int> y;
  cin >> x;
  while(x>=calc*7)
    calc*=7;
  while(calc >= 7){
    y.push_back(x/calc);
    x-=(x/calc)*calc;
    calc/=7;
    count++;
  }
  y.push_back(x);
  for(int i=0;i<count;i++)
    cout << y[i];
  cout << "\n";
  return 0;
}