Easy
Given the roots of two binary trees root and subRoot, return true if subRoot appears as a subtree of root (a node of root plus all its descendants matches subRoot exactly).
Input: root = [3,4,5,1,2], subRoot = [4,1,2] Output: true
Input: root = [3,4,5,1,2,null,null,null,null,0], subRoot = [4,1,2] Output: false