From 053f8c9ee1dab980be4b7d7facc9ae696fd3da0c Mon Sep 17 00:00:00 2001
From: RiaOh <ken5840714@gmail.com>
Date: Wed, 23 Apr 2025 23:27:25 +0900
Subject: [PATCH 1/2] merge-tw-sorted-lists solution

---
 merge-two-sorted-lists/RiaOh.js | 34 +++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 merge-two-sorted-lists/RiaOh.js

diff --git a/merge-two-sorted-lists/RiaOh.js b/merge-two-sorted-lists/RiaOh.js
new file mode 100644
index 000000000..978f23a57
--- /dev/null
+++ b/merge-two-sorted-lists/RiaOh.js
@@ -0,0 +1,34 @@
+/**
+ * Definition for singly-linked list.
+ * function ListNode(val, next) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.next = (next===undefined ? null : next)
+ * }
+ */
+/**
+ * @param {ListNode} list1
+ * @param {ListNode} list2
+ * @return {ListNode}
+ */
+var mergeTwoLists = function (list1, list2) {
+  const node = new ListNode();
+  let tail = node;
+
+  while (list1 && list2) {
+    if (list1.val < list2.val) {
+      tail.next = list1;
+      list1 = list1.next;
+    } else {
+      tail.next = list2;
+      list2 = list2.next;
+    }
+    tail = tail.next;
+  }
+
+  if (list2) {
+    tail.next = list2;
+  } else if (list1) {
+    tail.next = list1;
+  }
+  return node.next;
+};

From 78cdc6a8cc41f487644d4d4b666b53d18c054f85 Mon Sep 17 00:00:00 2001
From: RiaOh <ken5840714@gmail.com>
Date: Thu, 24 Apr 2025 23:54:08 +0900
Subject: [PATCH 2/2] maximum-depth-of-binary-tree solution

---
 maximum-depth-of-binary-tree/RiaOh.js | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 maximum-depth-of-binary-tree/RiaOh.js

diff --git a/maximum-depth-of-binary-tree/RiaOh.js b/maximum-depth-of-binary-tree/RiaOh.js
new file mode 100644
index 000000000..67d89ab83
--- /dev/null
+++ b/maximum-depth-of-binary-tree/RiaOh.js
@@ -0,0 +1,22 @@
+/**
+ * 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 === null) {
+    return 0;
+  } else {
+    const leftDepth = maxDepth(root.left);
+    const rightDepth = maxDepth(root.right);
+
+    return Math.max(leftDepth, rightDepth) + 1;
+  }
+};