#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0;i<n;++i)
#define FOR(i,a,b) for(int i=a;i<b;++i)
#define RFOR(i,a,b) for(int i=b-1;i>=a;--i)
#define ALL(x) (x).begin(), (x).end()

#define ull unsigned long long
#define ll long long


signed main(void){
	ull N; cin >> N;
	ull a = N;
	ull s = 0;
	while(N > 0){
		s += N;
		N /= 2;
	}
	cout << a*2 - s << endl;
	return 0;
}