#include <bits/stdc++.h>
using namespace std;
using ll = long long;

long long intpow(long long a, long long b){ 
    long long ans = 1; 
    while(b){ 
        if(b & 1) ans *= a; 
        a *= a; 
        b >>= 1; 
    } 
    return ans;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll n;
    cin >> n;
    ll b = __builtin_popcountll(n);
    if(b <= 1){
        cout << 0 << '\n';
        return 0;
    }
    cout << intpow(2, b) - 2 << '\n';
}