#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string>
#include <map>


typedef long long ll;
#define fi first
#define se second

using namespace std;

ll N;
ll num;


int main(){
  
  cin>>N;
  
  num = 1;
  int cnt = 0;
  int i;
  
  while( N > num ){
    num *= 7;
  }
  
  while( num ){
    if( cnt || N/num ){
      printf("%d", N/num);
      cnt++;
    }
    
    N %= num;
    num /= 7;
  }
  
  puts("");
  
  return 0;
}