use std::io::{read_to_string, stdin};

fn countf2x(x: u64) -> u64 {
    // f(2^x - 1) = 2^(x-1) * x;
    if x == 0 {
        0
    } else {
        2u64.pow((x - 1) as u32) * x
    }
}

fn countf(n: u64) -> u64 {
    let mut x = 32u64;
    let mut t = 1u64 << 32u64;
    if n == 0 {
        return 0;
    }
    while t & n == 0 {
        t >>= 1;
        x -= 1;
    }

    countf2x(x) + (n + 1 - t) + countf(n - t)
}

fn main() {
    let temp = read_to_string(stdin()).unwrap();
    let mut iter = temp
        .split_ascii_whitespace()
        .map(|x| x.parse::<usize>().unwrap());

    let n = iter.next().unwrap() as u64;

    println!("{}", countf(n));
}