| 179|[Largest Number](https://github.com/interviewcoder/leetcode/blob/master/src/_179_LargestNumber/Solution.java)| Medium|`Sort`||

| 186|[Reverse words in a string II](https://github.com/interviewcoder/leetcode/blob/master/src/_186_ReverseWordsInAStringII/Solution.java)| Medium|`Array`| two pass + include last position trick|

| 187| Repeated DNA Sequences| Medium|`Hash Table``Bit Manipulation`||

| 188| Best Time to Buy and Sell Stock IV| Hard|`Dynamic Programming`||

| 188|[Best Time to Buy and Sell Stock IV](https://github.com/interviewcoder/leetcode/blob/master/src/_188_BestTimeToBuyAndSellStockIV/Solution.java)| Hard|`Dynamic Programming`||

| 189|[Rotate Array](https://github.com/interviewcoder/leetcode/blob/master/src/_189_RotateArray/Solution.java)| Easy|`Array`||

| 190| Reverse Bits| Easy|`Bit Manipulation`||

| 191| Number of 1 Bits| Easy|`Bit Manipulation`||

| 279| Perfect Squares| Medium|`Dynamic Programming``Breadth-first Search``Math`||

| 282| Expression Add Operators| Hard|`Divide and Conquer`||

| 283|[Move Zeroes](https://github.com/interviewcoder/leetcode/blob/master/src/_283_MoveZeroes/Solution.java)| Easy|`Array``Two Pointers`||

| 284| Peeking Iterator| Medium|`Design`||

| 284|[Peeking Iterator](https://github.com/interviewcoder/leetcode/blob/master/src/_284_PeekingIterator/Solution.java)| Medium|`Design`||

| 285|[Inorder Successor in BST](https://github.com/interviewcoder/leetcode/tree/master/src/_285_InorderSuccessorInBST)| Medium|`Tree`||

| 286|[Walls And Gates](https://github.com/interviewcoder/leetcode/tree/master/src/_286_WallsAndGates)| Medium|`BFS`||

| 287| Find the Duplicate Number| Hard|`Array``Two Pointers``Binary Search`||

| 289| Game of Life| Medium|`Array`||

| 290| Word Pattern| Easy|`Hash Table`||

1.[DFS/Backtracking](https://github.com/interviewcoder/leetcode/blob/master/doc/category_dfs.md)

0.[DFS/Backtracking](https://github.com/interviewcoder/leetcode/blob/master/doc/category_dfs.md)

- Backtracking:`template``skip duplicates``prune siblings`

0.[Dynamic Programming](https://github.com/interviewcoder/leetcode/blob/master/doc/category_dp.md)

Basic operations, string manipulation,

| Type| #| Description|

| -----|:---:| ------|

|`String``Include Last`| 151| Reverse Words In A String|

| Type| #| Description|

| ---------------------:|:---:| :------------|

| rotated array| 153|[Find Minimum in Rotated Sorted Array](https://github.com/interviewcoder/blob/master/src/_153_FindMinimumInRotatedSortedArray/)|

| rotated array| 154|[Find Minimum in Rotated Sorted Array II]()|

| matrix| 240|[Search A 2D Matrix II](https://github.com/interviewcoder/leetcode/blob/master/src/_240_SearchA2DMatrixII/Solution.java)|