changes difficulty count and ay easy --> medium

Author: anishSachdeva

Diff for: README.md

@@ -19,7 +19,7 @@
 | 27 | [Remove Element](https://leetcode.com/problems/remove-element/) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/RemoveElement.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/remove_element.py)|
 | 28 | [Needle in Haystack](https://leetcode.com/problems/implement-strstr) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/NeedleInHaystack.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/needle_in_haystack.py) |
 | 35 | [Search Inserted Position](https://leetcode.com/problems/search-insert-position/) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/SearchInsertPosition.java) [![Python](https://img.icons8.com/color/35/000000/python.png)](python/search_insert_position.py) |
-| 38 | [Count and Say](https://leetcode.com/problems/count-and-say) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/CountAndSay.java) |
+| 38 | [Count and Say](https://leetcode.com/problems/count-and-say) | Medium | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/CountAndSay.java) |
 | 53 | [Maximum SubArray](https://leetcode.com/problems/maximum-subarray) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/MaximumSubArray.java) |
 | 58 | [Length of Last Word](https://leetcode.com/problems/length-of-last-word) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/LengthOfLastWord.java) |
 | 66 | [Plus One](https://leetcode.com/problems/plus-one) | Easy | [![Java](https://img.icons8.com/color/40/000000/java-coffee-cup-logo.png)](src/PlusOne.java) |