👉 Non-repetition is a concept in computer science and mathematics that refers to a property where an input sequence does not contain any duplicate elements. In other words, if you have a sequence of numbers or characters, and you remove each duplicate element from it, all remaining elements will be unique. This property is essential for various algorithms such as sorting, searching, and counting occurrences of elements in data structures like hash tables. For example, consider the following sequence: 1, 2, 3,
