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feat: add js solution to lc problem: No.1110 #3284
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41 changes: 41 additions & 0 deletions
solution/1100-1199/1110.Delete Nodes And Return Forest/Solution.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /** | ||
| * 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} root | ||
| * @param {number[]} to_delete | ||
| * @return {TreeNode[]} | ||
| */ | ||
| var delNodes = function (root, to_delete) { | ||
| const s = Array(1001).fill(false); | ||
| for (const x of to_delete) { | ||
| s[x] = true; | ||
| } | ||
| const ans = []; | ||
| const dfs = root => { | ||
| if (!root) { | ||
| return null; | ||
| } | ||
| root.left = dfs(root.left); | ||
| root.right = dfs(root.right); | ||
| if (!s[root.val]) { | ||
| return root; | ||
| } | ||
| if (root.left) { | ||
| ans.push(root.left); | ||
| } | ||
| if (root.right) { | ||
| ans.push(root.right); | ||
| } | ||
| return null; | ||
| }; | ||
| if (dfs(root)) { | ||
| ans.push(root); | ||
| } | ||
| return ans; | ||
| }; |
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