Leetcode Problem 2313. Minimum Flips in Binary Tree to Get Result

2313. Minimum Flips in Binary Tree to Get Result

Leetcode Solutions

DFS with Memoization

  1. Define a recursive DFS function that takes a node and a target result (true or false) as arguments.
  2. If the node is a leaf, return 0 if its value matches the target, or 1 if it doesn't.
  3. If the node is a non-leaf, recursively call the DFS function on its children to get the minimum flips for them to evaluate to true and false.
  4. Based on the operation at the current node (OR, AND, XOR, NOT), calculate the minimum flips required for the current node to evaluate to the target result using the values obtained from its children.
  5. Use memoization to cache the results of the DFS calls for each node and target result pair to avoid redundant calculations.
  6. Initiate the DFS call on the root node with the given target result and return the result as the minimum number of flips required.
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Simple Recursive DFS

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