449. Serialize and Deserialize BST

[atorbek]

• https://leetcode.com/problems/serialize-and-deserialize-bst/
  1372. Longest ZigZag Path in a Binary Tree
• https://leetcode.com/problems/longest-zigzag-path-in-a-binary-tree/
  1768. Merge Strings Alternately
• https://leetcode.com/problems/merge-strings-alternately/
  1431. Kids With the Greatest Number of Candies
• https://leetcode.com/problems/kids-with-the-greatest-number-of-candies/