Update README for problem 10

Author: anirudhology

Diff for: README.md

@@ -12,6 +12,7 @@ LeetCode solutions in Python
 | 4          | Median Of Two Sorted Arrays                               | [Solution](problems/binary_search/median_of_two_sorted_arrays.py)                          | Hard       | Binary Search                         |
 | 5          | Longest Palindromic Substring                             | [Solution](problems/dynamic_programming/longest_palindromic_substring.py)                  | Medium     | Dynamic Programming                   |
 | 7          | Reverse Integer                                           | [Solution](problems/math/reverse_integer.py)                                               | Medium     | Math                                  |
+| 10         | Regular Expression Matching                               | [Solution](problems/dynamic_programming/regular_expression_matching.py)                    | Hard       | Dynamic Programming                   |
 | 11         | Container With Most Water                                 | [Solution](problems/array/container_with_most_water.py)                                    | Medium     | Array, Two Pointers                   |
 | 15         | 3 Sum                                                     | [Solution](problems/array/three_sum.py)                                                    | Medium     | Array, Sorting, Two Pointers          |
 | 17         | Letter Combinations Of A Phone Number                     | [Solution](problems/backtracking/letter_combinations_of_a_phone_number.py)                 | Medium     | Backtracking                          |