#572

Subtree of Another Tree

easy · verified · 51.3% accepted · 8,872 likes · top 40%

tree · depth-first search · string matching · binary tree · hash function

⊣ practice⊣ quiz⊣ open on leetcode ↗

Description

Given the roots of two binary trees root and subRoot, return true if there is a subtree of root with the same structure and node values of subRoot and false otherwise.

A subtree of a binary tree tree is a tree that consists of a node in tree and all of this node's descendants. The tree tree could also be considered as a subtree of itself.

Example 1:

Input: root = [3,4,5,1,2], subRoot = [4,1,2]
Output: true

Example 2:

Input: root = [3,4,5,1,2,null,null,null,null,0], subRoot = [4,1,2]
Output: false

Solution