Function lowest_set_bit 

pub fn lowest_set_bit(n: u64) -> u64

Eng past 1 bitni ajratib oladi: n & (-n).

Fenwick tree (BIT) ma’lumot strukturasining asosi.

Misol

use rust_algorithms::numbers::lowest_set_bit;

assert_eq!(lowest_set_bit(12), 4); // 1100 → 0100
assert_eq!(lowest_set_bit(0), 0);