diff --git a/clone-graph/hwanmini.js b/clone-graph/hwanmini.js
new file mode 100644
index 000000000..80e364a5f
--- /dev/null
+++ b/clone-graph/hwanmini.js
@@ -0,0 +1,39 @@
+// 노드 수 v, 간선 e
+// 시간복잡도 O(v+e)
+// 공간복잡도 O(v+e)
+
+/**
+ * // Definition for a _Node.
+ * function _Node(val, neighbors) {
+ *    this.val = val === undefined ? 0 : val;
+ *    this.neighbors = neighbors === undefined ? [] : neighbors;
+ * };
+ */
+
+/**
+ * @param {_Node} node
+ * @return {_Node}
+ */
+var cloneGraph = function(node) {
+    if (!node) return
+
+    const visited = new Map()
+    visited.set(node, new _Node(node.val))
+
+    const que = [node]
+
+    while (que.length) {
+        const curNode = que.shift()
+
+        for (neighbor of curNode.neighbors) {
+            if (!visited.has(neighbor)) {
+                visited.set(neighbor, new _Node(neighbor.val));
+                que.push(neighbor)
+            }
+
+            visited.get(curNode).neighbors.push(visited.get(neighbor))
+        }
+    }
+
+    return visited.get(node)
+};
diff --git a/merge-two-sorted-lists/hwanmini.js b/merge-two-sorted-lists/hwanmini.js
new file mode 100644
index 000000000..eced76a97
--- /dev/null
+++ b/merge-two-sorted-lists/hwanmini.js
@@ -0,0 +1,38 @@
+// m: list1, n: list2
+// 시간복잡도: O(m + n)
+// 공간복잡도: O(m + n)
+
+/**
+ * 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) {
+    let res = new ListNode()
+    let resCopy = res
+
+    while (list1 && list2) {
+        if (list1.val < list2.val) {
+            res.next = list1
+            list1 = list1.next;
+        } else {
+            res.next = list2
+            list2 = list2.next;
+        }
+
+        res = res.next
+    }
+
+    if (list1) res.next = list1;
+    if (list2) res.next = list2
+
+    return resCopy.next
+};
+