Freaks City

This article addresses the problem of identifying and counting specific 4-tuples based on a given set of 3-tuples. Given a collection of M three-element tuples (a, b, c), the objective is to determine the total number of distinct 4-element tuples (x, y, z, w) that satisfy the following conditions: (x, y, z) is one of the input 3-tuples. The 3- ...