Given a string s, return the substring of s that is the largest in lexicographical order.

Constraints:

• $1 \le$ s.length $\le 4 imes 10^5$

• s contains only lowercase English letters.

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.