[jj7779607] Week7

reverse-linked-list/limlimjo.js

@@ -0,0 +1,23 @@
+/**
+ * Definition for singly-linked list.
+ * function ListNode(val, next) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.next = (next===undefined ? null : next)
+ * }
+ */
+/**
+ * @param {ListNode} head
+ * @return {ListNode}
+ */
+var reverseList = function (head) {
+  let [prev, curr] = [null, head];
+
+  while (curr) {
+    [curr.next, prev, curr] = [prev, curr, curr.next];
+  }
+
+  return prev;
+};
+
+// 시간복잡도: O(n)
+// 공간복잡도: O(1)