#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(ip)]
use std::net::Ipv4Addr;
fn main() {
    assert_eq!(Ipv4Addr::new(100, 64, 0, 0).is_shared(), true);
    assert_eq!(Ipv4Addr::new(100, 127, 255, 255).is_shared(), true);
    assert_eq!(Ipv4Addr::new(100, 128, 0, 0).is_shared(), false);
}