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Article · Java
Secret Cipher – O(n) Java Solution Using KMP
Learn how to solve the Secret Cipher problem efficiently using the KMP (Knuth-Morris-Pratt) prefix function / LPS array in Java. This article explains how repeated prefixes can be identified and compressed using *, how the algorithm constructs the lexicographically smallest encrypted string, and how to achieve O(n) time complexity for strings up to 105 characters.
