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gitsunmin.ts
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24 lines (21 loc) ยท 724 Bytes
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/**
* https://leetcode.com/problems/same-tree/
* time complexity : O(n)
* space complexity : O(n)
*/
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)
}
}
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);
};