code: def remove(self, val):
      if val not in self.num_to_idx:
          return False
  
      idx = self.num_to_idx[val]
      last = self.num_list[-1]
  
      # swap last elem to current spot so you can pop the end
      self.num_list[idx] = last
      self.num_list.pop()
      self.num_to_idx[last] = idx
      del self.num_to_idx[val]
  
      return True
  
imports: import random
label_desc: Use image node_id 3 for calling the RandomizedSet obj's underlying member method code with example usage: obj.remove(val) and returns: True, False