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Grokking the Coding Interview Patterns in C#

Solution: Find the Lexicographically Largest String From Box II

Explore how to apply the two-pointer technique to find the lexicographically largest substring from a string split into multiple non-empty parts. Understand the algorithm that compares and skips suffixes to optimize substring selection in linear time. This lesson equips you with skills to solve substring comparison problems efficiently during coding interviews.

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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 ...