maoeurk

  wearing(person1, hat), is_hat(hat), is_green(hat), is_person(person1), is_person(person2), looking_at(person1, person2).

  let mut cache: Vec<usize> = (0..=target.chars().count()).collect();

  let mut cache: Vec<usize> = vec![0; target.len()];

  cache := make([]int, len(target)+1)
  for i := 0; i < len(target)+1; i++ {
    cache[i] = i
  }