solves contains duplicate iii in java

Author: anishLearnsToCode

README.md

@@ -177,7 +177,7 @@
 | 216  | [Combination Sum III](https://leetcode.com/problems/combination-sum-iii)                                                                                  |                                                                [![Java](assets/java.png)](src/CombinationSumIII.java)                                                                |                                                                                                                                   |
 | 217  | [Contains Duplicate](https://leetcode.com/problems/contains-duplicate)                                                                                    |                                 [![Java](assets/java.png)](src/ContainsDuplicate.java) [![Python](assets/python.png)](python/contains_duplicate.py)                                  |                                                                                                                                   |
 | 219  | [Contains Duplicate II](https://leetcode.com/problems/contains-duplicate-ii)                                                                              |                               [![Java](assets/java.png)](src/ContainsDuplicateII.java) [![Python](assets/python.png)](python/contains_duplicate_ii.py)                               |                                                                                                                                   |
-| 220  | [Contains Duplicate III](https://leetcode.com/problems/contains-duplicate-iii)                                                                            |                                                                [![Java](assets/java.png)](src/ContainsDuplicateIII.java)                                                                 |                                                                                                                                   |
+| 220  | [Contains Duplicate III](https://leetcode.com/problems/contains-duplicate-iii)                                                                            |                                                              [![Java](assets/java.png)](src/ContainsDuplicateIII.java)                                                               |                                                                                                                                   |
 | 221  | [Maximal Square](https://leetcode.com/problems/maximal-square)                                                                                            |                                                                                                                                                                                      |                                                                                                                                   |
 | 222  | [Count Complete Tree Nodes](https://leetcode.com/problems/count-complete-tree-nodes)                                                                      |                                                             [![Java](assets/java.png)](src/CountCompleteTreeNodes.java)                                                              |                                                                                                                                   |
 | 223  | [Rectangle Area](https://leetcode.com/problems/rectangle-area)                                                                                            |                                                                                                                                                                                      |                                                                                                                                   |