#include<bits/stdc++.h>
#define int long long
using namespace std;

signed main(){
    int n,k;
    cin>>n;
    k=n;
    int s=1;
    while(n){
        if(n&1){
            s*=2;

        }
        n>>=1;
    }
    cout<<k+1-s<<endl;
    return 0;
}