#include<bits/stdc++.h>
#define FL(i,a,b) for(int i=(a);i<=(b);i++)
#define FR(i,a,b) for(int i=(a);i>=(b);i--)
#define ll long long
using namespace std;
ll n;
signed main(){
	scanf("%lld",&n);
	ll t=n,res=1;
	while(t){
		if(t&1) res<<=1;
		t>>=1;
	}
	printf("%lld\n",n+1-res);
}