#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(bigint_helper_methods)]
fn main() {
    assert_eq!(5i32.widening_mul(- 2), (4294967286, - 1));
    assert_eq!(1_000_000_000i32.widening_mul(- 10), (2884901888, - 3));
}