# LeetCode C

## Order list
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0020 | Valid Parentheses | Easy | 1) Stack|
| 0056 | Merge Intervals | Medium | 1)* <br/> 2)* |
| 0057 | Insert Interval | Medium | 1)* |
| 0125 | Valid Palindrome | Easy | 1)* <br/> 2)* Two Pointers |
| 0190 | Reverse Bits | Easy | 1)* 2)* 3) 4) Bitwise <br/> 5) Bitwise + mask |
| 0242 | Valid Anagram | Easy | 1)* Sort array <br/> 2)* 4)* Hash table <br/> 3) Array |
| 0344 | Reverse String | Easy | 1)* <br/> 2)* Two Pointers <br/> 3) Recursion |
| 0509 | Fibonacci Number | Easy | 1)* Recursion <br/> 2)* Iteration <br/> 3)* Dynamic Programmin |

## Topic list
### Bitwise
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0190 | Reverse Bits | Easy | 1)* 2)* 3) 4) Bitwise <br/> 5) Bitwise + mask |

### Dynamic Programmin
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0509 | Fibonacci Number | Easy | 1)* Recursion <br/> 2)* Iteration <br/> 3)* Dynamic Programmin |

## Hash table
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0242 | Valid Anagram | Easy | 1)* Sort array <br/> 2)* 4)* Hash table <br/> 3) Array |

## Interval
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0056 | Merge Intervals | Medium | 1)* <br/> 2)* |
| 0057 | Insert Interval | Medium | 1)* |

### Pointers
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0125 | Valid Palindrome | Easy | 1)* <br/> 2)* Two Pointers
| 0344 | Reverse String | Easy | 1)* <br/> 2)* Two Pointers <br/> 3) Recursion |

### Recursion
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0344 | Reverse String | Easy | 1)* <br/> 2)* Two Pointers <br/> 3) Recursion |
| 0509 | Fibonacci Number | Easy | 1)* Recursion <br/> 2)* Iteration <br/> 3)* Dynamic Programmin |

### Stack
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0020 | Valid Parentheses | Easy | 1) Stack|

### String
| No. | Problem | Difficulty | Solution |
| --- | :------ | :--------- | :------- |
| 0020 | Valid Parentheses | Easy | 1) Stack|
| 0125 | Valid Palindrome | Easy | 1)* <br/> 2)* Two Pointers
| 0242 | Valid Anagram | Easy | 1)* Sort array <br/> 2)* 4)* Hash table <br/> 3) Array |

[Algorithm - Theory](https://hackmd.io/HNTS1fpvRtqjpGlUiQEV3g)
[GitHub](https://github.com/jaleo73422/LeetCode_C)
[NeetCode YouTube](https://www.youtube.com/c/NeetCode/playlists)
[wisdompeak LeetCode in GitHub](https://github.com/wisdompeak/LeetCode)
[JIAKAOBO LeetCode](https://www.jiakaobo.com/leetcode.html)