JavaScript刷LeetCode -- 222. Count Complete Tree Nodes
一、題目
Given a complete binary tree, count the number of nodes.
二、題目大意
計算完全二叉樹節點的個數。
三、解題思路
遞迴遍歷
四、程式碼實現
const countNodes = root => { const ans = [] dfs(root) return ans.length function dfs (root) { if (!root) { return } ans.push(root.val) dfs(root.left) dfs(root.right) } }
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