#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int n;
  cin>>n;
  if(!n){
    cout<<0<<endl;
    return 0;
  }
  string ans;
  while(n){
    ans+=n%7+'0';
    n/=7;
  }
  reverse(ans.begin(),ans.end());
  cout<<ans<<endl;
  return 0;
}