use std::collections::HashSet;
fn union(`[set: &mut HashSet<i32>]`, `[other: &HashSet<i32>]`) -> bool {
  let orig_len = set.len();
  `[for el in other]` {
    `[set.insert(*el);]`
  }
  `[let final_len = set.len();]`
  return orig_len != final_len;
}