/** * 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} root1 * @param {TreeNode} root2 * @return {number[]} */ var getAllElements = function(root1, root2) { let arr_left = [] let arr_right = [] let dfs = (data, arr) => { if (data) { dfs(data.left, arr) dfs(data.right, arr) arr.push(data.val) } } dfs(root1, arr_left) dfs(root2, arr_right) return arr_left.concat(arr_right).sort((a, b) => {return a - b}) };

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