Leetcode Problem 1612. Check If Two Expression Trees are Equivalent

1612. Check If Two Expression Trees are Equivalent

Leetcode Solutions

Using Counter to Track Operand Frequencies

  1. Define a recursive function dfs that takes a node and a counter as arguments.
  2. If the node is None, return immediately.
  3. If the node is a leaf (operand), update the counter by incrementing or decrementing based on the tree being traversed.
  4. Recursively call dfs on the left and right children of the node.
  5. After traversing both trees, check if all counts in the counter are zero.
  6. Return True if all counts are zero, otherwise return False.
UML Thumbnail

Evaluating Trees and Comparing Results

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...