LeetCode problem's solutions.

LeetCode Algorithms.

#	Title	Language	Difficulty
1	Two Sum	Java	Easy
10	Regular Expression Matching	Scala, C	Hard
130	Surrounded Regions	Java	Medium
136	Single Number	Java	Easy
146	LRU Cache	Scala	Hard
149	Max Points on a Line	Scala	Hard
151	Reverse Words in a String	Java	Medium
189	Rotate Array	Java	Easy
198	House Robber	Java	Easy
20	Valid Parentheses	Scala	Easy
200	Number of Islands	Java	Medium
217	Contains Duplicate	Java	Easy
257	Binary Tree Paths	Scala	Easy
26	Remove Duplicates from Sorted Array	Java	Easy
297	Serialize and Deserialize Binary Tree	Java, C	Hard
322	Coin Change	Scala	Medium
44	Wildcard Matching	Scala	Hard
56	Merge Intervals	Java	Medium
565	Array Nesting	Scala	Medium
598	Range Addition II	Scala	Easy
599	Minimum Index Sum of Two Lists	Scala	Easy
695	Max Area of Island	Java	Medium
717	1-bit and 2-bit Characters	Java	Easy
8	String to Integer (atoi)	Scala	Medium
2	Add Two Numbers	Java	Medium
82	Remove Duplicates from Sorted List II	Java	Medium
19	Remove Nth Node From End of List	Java	Medium
23	Merge k Sorted Lists	Java	Hard
25	Reverse Nodes in k-Group	Java	Hard
338	Counting Bits	Java	Medium
213	House Robber II	Java	Medium
1038	Binary Search Tree to Greater Sum Tree	Java	Medium
1003	Check If Word Is Valid After Substitutions	Java	Medium
64	Minimum Path Sum	Java	Medium
1233	Remove Sub-Folders from the Filesystem	Java	Medium
139	Word Break	Java	Medium