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gwbaik9717.js
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38 lines (33 loc) · 814 Bytes
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// n: number of nodes
// Time complexity: O(n)
// Space complexity: O(n)
/**
* Definition for a binary tree node.
* function TreeNode(val, left, right) {
* this.val = (val===undefined ? 0 : val)
* this.left = (left===undefined ? null : left)
* this.right = (right===undefined ? null : right)
* }
*/
/**
* @param {TreeNode} p
* @param {TreeNode} q
* @return {boolean}
*/
var isSameTree = function (p, q) {
const dfs = (currentP, currentQ) => {
if (!currentP && !currentQ) {
return true;
}
if ((!currentP && currentQ) || (currentP && !currentQ)) {
return false;
}
if (currentP.val !== currentQ.val) {
return false;
}
return (
dfs(currentP.left, currentQ.left) && dfs(currentP.right, currentQ.right)
);
};
return dfs(p, q);
};