Add more followup links for Max Subarray problem.

Author: trekhleb

src/algorithms/sets/maximum-subarray/README.md

@@ -26,3 +26,4 @@ with the largest sum is `4, −1, 2, 1`, with sum `6`.
 - [Wikipedia](https://en.wikipedia.org/wiki/Maximum_subarray_problem)
 - [YouTube](https://www.youtube.com/watch?v=ohHWQf1HDfU&list=PLLXdhg_r2hKA7DPDsunoDZ-Z769jWn4R8)
 - [GeeksForGeeks](https://www.geeksforgeeks.org/largest-sum-contiguous-subarray/)
+- [LeetCode](https://leetcode.com/explore/interview/card/top-interview-questions-easy/97/dynamic-programming/566/discuss/1595195/C++Python-7-Simple-Solutions-w-Explanation-or-Brute-Force-+-DP-+-Kadane-+-Divide-and-Conquer)