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YeomChaeeun.ts
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29 lines (27 loc) · 760 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)
* }
* }
*/
/**
* 같은 트리인지 확인하기
* 알고리즘 복잡도
* - 시간 복잡도: O(n)
* - 공간 복잡도: O(n)
* @param p
* @param q
*/
function isSameTree(p: TreeNode | null, q: TreeNode | null): boolean {
if(!p || !q) {
return p === q;
}
return p.val === q.val && isSameTree(p.left, q.left) && isSameTree(p.right, q.right)
}