Update README.md

Author: khushi3004

README.md

@@ -9,6 +9,7 @@ Number | Name of Problem | Leetcode Link | Video Link | Code
 198 | House Robber | https://leetcode.com/problems/house-robber/ | https://youtu.be/YEEQRP2ZFxk | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/198.%20House%20Robber
 206 | Reverse Linked List | https://leetcode.com/problems/reverse-linked-list/description/ | https://youtu.be/rzXJe1xMHLc | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/206.%20Reverse%20Linked%20List
 213 | House Robber II | https://leetcode.com/problems/house-robber-ii/ | https://youtu.be/5bxF0MJ1oM0 | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/213.%20House%20Robber%20II
+300 | Longest Increasing Subsequence | https://leetcode.com/problems/longest-increasing-subsequence/description/ | https://youtu.be/iyd-8fpqEgU | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/300.%20Longest%20Increasing%20Subsequence
 337 | House Robber III | https://leetcode.com/problems/house-robber-iii/ | https://youtu.be/FRP5l83XoZo | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/337.%20House%20Robber%20III
 403 | Frog jump | https://leetcode.com/problems/frog-jump/ | https://youtu.be/3FYCPlIx3YA | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/403.%20Frog%20Jump
 862 | Shortest Subarray with Sum at Least K | https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/description/ | https://youtu.be/eWbH_j6Lgnk | https://github.com/Algorithms-Made-Easy/Leetcode-Challenge/blob/main/862.%20Shortest%20Subarray%20with%20Sum%20at%20Least%20K