#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
template<class T> inline bool chmax(T&a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T&a,T b){if(a>b){a=b;return 1;}return 0;}
using ll = long long;

int n;

int main () {
  cin.tie(0); ios::sync_with_stdio(false); 

  cin >> n;
  vector<int> ans;
  if(n==0) ans.push_back(0);
  while(n) ans.push_back(n%7), n/=7;
  for(int i=ans.size()-1;i>=0;i--) cout << ans[i];
  cout << endl;
}