|150|[Evaluate Reverse Polish Notation](https://leetcode.com/problems/evaluate-reverse-polish-notation/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_150.java)| O(?)|O(?) | Medium

|149|[Max Points on a Line](https://leetcode.com/problems/max-points-on-a-line/)|[Solution](../master/src/main/java/com/fishercoder/solutions/MaxPointsonaLine.java)| O(?)|O(?) | Hard|

|148|[Sort List](https://leetcode.com/problems/sort-list/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_148.java) O(nlogn)|O(h) | Medium| Linked List, Sort

|146|[LRU Cache](https://leetcode.com/problems/lru-cache/)|[Doubly Linked List](../master/src/main/java/com/fishercoder/solutions/_146_use_DoublyLinkedList_plus_HashMap.java) |[Linked Hash Map](../master/leetcode-algorithms/src/main/java/com/fishercoder/solutions/_146_use_LinkedHashMap.java)| O(?)|O(?) | Hard| Linked List

|145|[Binary Tree Postorder Traversal](https://leetcode.com/problems/binary-tree-postorder-traversal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_145.java)| O(n)|O(h) | Hard| Binary Tree

|144|[Binary Tree Preorder Traversal](https://leetcode.com/problems/binary-tree-preorder-traversal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_144.java)| O(n)|O(h) | Medium| Binary Tree

public ListNode insertionSortList(ListNode head) {

ListNode temp = head;