#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MAX 1000000
#define MOD 1000000007
//#define INF 1000000000
#define INF 1000000000000000000

int main(){
  ll D;
  cin>>D;
  //cout<<(D+2)/2<<endl;
  vector<ll> pow2(60);
  vector<ll> sum(60);
  for(int i=0;i<60;i++){
    pow2[i]=1LL<<i;
    sum[i]=(1LL<<(i+1))-1;
  }

  ll ans=D;
  for(int i=0;i<60;i++){
    ll d=D;
    ll x=0;
    ll cnt=d/sum[i];
    d-=sum[i]*cnt;
    x+=pow2[i]*cnt;
    for(int j=i-1;j>=0;j--){
      if(d>=sum[j]){
        d-=sum[j];
        x+=pow2[j];
      }
    }
    if(d==0){
      ans=min<ll>(ans,x);
    }
  }
  cout<<ans<<endl;
}