Leetcode Problem 1938. Maximum Genetic Difference Query

1938. Maximum Genetic Difference Query

Leetcode Solutions

Trie + DFS Approach

  1. Define a TrieNode class with an array to hold child nodes and a count of how many times a node is visited.
  2. Implement Trie with methods to insert and remove numbers, and to find the maximum XOR for a given number.
  3. Create a graph representation of the tree using the parents array.
  4. Use DFS to traverse the tree, adding each node's genetic value to the Trie.
  5. For each node visited, answer all queries associated with that node using the Trie to find the maximum XOR value.
  6. After processing queries for a node, remove the node's genetic value from the Trie before backtracking.
  7. Return the answers to the queries in the order they were asked.
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Brute Force Approach

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