# Leaf-Similar Trees

Category

Binary Tree - DFS

Checkbox

Checkbox

Difficulty

Easy

Index

34

Key Ideas

The key idea to solve the problem "Leaf-Similar Trees" is to perform a depth-first search (DFS) traversal on both trees and compare the leaf nodes in the same order.

Problem Number

872

Problem Summary

Leaf-Similar Trees is a problem in the Binary Tree - DFS category on LeetCode. The problem involves comparing the leaf values of two binary trees to determine if they are similar. A key pitfall to watch out for is ensuring that the comparison is done correctly, considering the order of the leaf nodes and handling cases where one tree has more leaf nodes than the other.

Solution Summary

The best solution to solve the "Leaf-Similar Trees" problem is as follows:
1. Traverse both trees using depth-first search (DFS) to obtain the leaf sequences.
2. Compare the leaf sequences of the two trees to determine if they are similar.
3. During the DFS traversal, when a leaf node is encountered, add its value to the leaf sequence of the current tree.
4. After obtaining the leaf sequences of both trees, compare them using a simple comparison operation.
5. If the leaf sequences are identical, return true; otherwise, return false.

Tags

Tree

Depth-First Search