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hoyeongkwak.ts
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23 lines (23 loc) · 733 Bytes
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/**
* Definition for a binary tree node.
* class TreeNode {
* val: number
* left: TreeNode | null
* right: TreeNode | null
* constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null) {
* this.val = (val===undefined ? 0 : val)
* this.left = (left===undefined ? null : left)
* this.right = (right===undefined ? null : right)
* }
* }
*/
/*
Time complexity: O(m)
Space complexity: O(h)
*/
function isSameTree(p: TreeNode | null, q: TreeNode | null): boolean {
if (p == null && q == null) return true
if (p == null || q == null) return false
if (p.val !== q.val) return false
return isSameTree(p.left, q.left) && isSameTree(p.right, q.right)
};