maximum depth of binary tree solution

Author: limlimjo

maximum-depth-of-binary-tree/limlimjo.js

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+// 시간 복잡도: O(n)
+// 공간 복잡도: 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} root
+ * @return {number}
+ */
+var maxDepth = function (root) {
+  if (!root) return 0;
+
+  let leftDepth = maxDepth(root.left);
+  let rightDepth = maxDepth(root.right);
+
+  return Math.max(leftDepth, rightDepth) + 1;
+};