#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, k; 
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = n; i; i >>= 1ll) k += (i & 1ll);
	cout << n + 1 - (1 << k);
    return 0;
}
/*
????????C n, k = \sum C (n >> i) & 1, (k >> i) & 1 
n & k == 0 ?? 0
*/