#include<iostream>
#include<string>
#include<queue>
#include<vector>
#include<cassert>
#include<random>
#include<set>
#include<map>
#include<cassert>
#include<unordered_map>
#include<bitset>
#include<numeric>
#include<algorithm>
using namespace std;
using ll = long long;
using ull = unsigned long long;
const int inf=1<<30;
const ll INF=1LL<<62;
using P = pair<int,int>;
typedef pair<int,P> PP; 
const ll MOD=998244353;
const int MAXN=100000;

int main(){
    ll N;
    cin>>N;

    ll c=1;
    while(N>0){
        if(N%2){
            c*=2;
        }
        N/=2;
    }

    ll ans=c-2;
    cout<<ans<<endl;


}