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Grokking the Coding Interview Patterns in Python

Solution: Find the Lexicographically Largest String From Box II

Understand how to apply the two pointers technique to efficiently find the lexicographically largest substring after splitting a string into unique parts. This lesson helps you compare substrings character-by-character and skip redundant checks to solve the problem in linear time.

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Statement

You are given a string, word, and an integer numFriends, representing the number of friends participating in a game organized by Alice.

The game consists of multiple rounds, and in each round:

  • The string word is split into exactly numFriends non-empty substrings.

  • The split must be unique; no previous round has produced the same sequence of splits.

  • All resulting substrings from the split are placed into a box.

When all rounds are over and all possible unique splits have been performed, determine ...