hyunsik

fn filter<T>(res: &mut [usize], lhs: &[T], rhs: &[T]) 
   where T : Copy + PartialOrd {

  let mut matched: usize = 0;
  
  for x in 0..lhs.len() {
    res[matched] = x;
    matched = matched + if lhs[x] > rhs[x] { 1 } else { 0 };
  }
}