#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    (0..5)
        .flat_map(|x| (x * 100)..(x * 110))
        .enumerate()
        .filter(|&(i, x)| (i + x) % 3 == 0)
        .for_each(|(i, x)| println!("{i}:{x}"));
}