update 13

Author: fishercoder1534

Diff for: paginated_contents/algorithms/1st_thousand/README.md

@@ -794,7 +794,7 @@
 | 16  | [3Sum Closest](https://leetcode.com/problems/3sum-closest/)                                                                                                                                   | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_16.java)                                                                   || Medium                                                                        | Two Pointers                     
 | 15  | [3Sum](https://leetcode.com/problems/3sum/)                                                                                                                                                   | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_15.java), [C++](../master/cpp/_15.cpp)                                     | [:tv:](https://www.youtube.com/watch?v=jeim_j8VdiM)                           | Medium                           | Two Pointers, Binary Search                                          
 | 14  | [Longest Common Prefix](https://leetcode.com/problems/longest-common-prefix/)                                                                                                                 | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_14.java)                                                                   | [:tv:](https://www.youtube.com/watch?v=K1ps6d7YCy4)                           | Easy                             
-| 13  | [Roman to Integer](https://leetcode.com/problems/roman-to-integer)                                                                                                                            | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_13.java)                                                                   |                                                                               | Easy                             | Math, String                                                         
+| 13  | [Roman to Integer](https://leetcode.com/problems/roman-to-integer)                                                                                                                            | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_13.java)                                                                   |                                                                               | Easy                             | Math, String, HashTable                                                         
 | 12  | [Integer to Roman](https://leetcode.com/problems/integer-to-roman/)                                                                                                                           | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_12.java)                                                                   || Medium                                                                        | Math, String                     
 | 11  | [Container With Most Water](https://leetcode.com/problems/container-with-most-water/)                                                                                                         | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_11.java)                                                                   || Medium                                                                        |
 | 10  | [Regular Expression Matching](https://leetcode.com/problems/regular-expression-matching/)                                                                                                     | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_10.java),  [Javascript](../master/javascript/_10.js)                           || Hard                                                                          | DP