fn main() {
    fn our_to_u32(n: i32) -> u32 {
        use std::convert::TryFrom;
        if n < 0 {
            u32::try_from(n + i32::max_value() + 1).unwrap()
        } else {
            n as u32 + i32::max_value() as u32 + 1
        }
    }

    println!("{}", our_to_u32(i32::min_value()));
    println!("{}", our_to_u32(i32::max_value()));
    assert_eq!(u32::max_value(), our_to_u32(i32::max_value()));
    assert_eq!(u32::min_value(), our_to_u32(i32::min_value()));
    println!("{}", our_to_u32(1));
}