129. Subtree of Another Tree

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

Output: true

Explanation: The subtree [4,1,2] exists within the tree [3,4,5,1,2].

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

Output: false

Explanation: The subtree [4,1,2] does not perfectly match any subtree within [3,4,5,1,2,null,null,null,null,0] because of the node with value '0'.

Input: root = [1,2,3], subRoot = [2]

Output: true

Explanation: The tree [2] exists as a subtree of [1,2,3].

Time Complexity

O(m × n)

Space Complexity

O(h)