README.md

Leetcode-Practice

LinkedIn Interview Questions:

Amazon Interview Questions

1. Two Sum Medium
2. Valid Parentheses Easy
3. Merge Two Sorted Lists Easy
4. Intersection of Two Linked Lists Easy
5. Valid Anagram Easy
6. Two Sum II - Input array is sorted Medium
7. Rotate Image Medium
8. Reverse Words in a String II Medium
9. Gray Code Medium
10. Reverse Linked List - Iterative Easy 206(2). Reverse Second Half of Linked Lists Medium
11. Group Anagrams- Sort, Hashmap Medium
12. Merge K Sorted Lists - Priority Queue Hard
13. Minimal Path Sum Medium
14. Binary Tree Right Side View(DFS and BFS) Medium
15. Number of Islands - BFS, Union and Find Medium
16. Subsets - Bit Manipulation Medium K Nearest Point to the Origin -- heap
17. Valid Binary Search Tree Medium

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BST:对于当前node，左子树最大节点值 < node.val < 右子树最小节点值 235. Lowest Common Ancestor of a Binary Search Tree - BST Property Easy 102. Binary Tree Level Order Traversal - BFS Easy 100. Same Tree

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8. String to Integer(atoi) Easy
9. Min Stack Easy
10. Count Primes Easy

----------------------- To be finished ------------------------ largest-bst-subtree 239. Sliding Maximum Window - deque Hard 146. LRU Cache Hard 5. Longest Palindromic Substring - Center Expand/DP Medium