This algorithm takes in a list of boxes where each box has its width, length, height, and volume. It sorts the boxes by decreasing volume into a box table. It creates an adjacency matrix to store which boxes can fit inside other boxes. It initializes a dynamic programming table with 1s along the diagonal and 0s elsewhere. It iterates through the table bottom-up and right-to-left, finding the maximum number of boxes that can fit in each box based on the adjacency matrix. It returns the maximum value in the results list containing the dynamic programming table diagonal. The time complexity is O(n2) where n is the number of boxes.