572. Subtree of Another Tree LeetCode Solution | Easy Approach

Minimum Cost to Merge Stones
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Subtree of Another Tree 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

Constraints:

  • The number of nodes in the root tree is in the range [1, 2000].
  • The number of nodes in the subRoot tree is in the range [1, 1000].
  • -104 <= root.val <= 104
  • -104 <= subRoot.val <= 104

Subtree of Another Tree Solutions

Time: O(n)
Space: O(n)

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