#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define int ll
int n,cnt=0;
inline int lowbit(int x){return x&-x;}
signed main(){
	cin>>n;
	int res=n+1;
	while(n){
		n-=lowbit(n);
		cnt++;
	}
	cout<<res-(1ll<<cnt);
}