Greatest Quantity of Non-Overlapping Substrings

This question requires you to determine the largest number of non-overlapping substrings from a specified string. Each of these substrings must include every instance of all their respective characters. Grasping this question necessitates careful attention to detail. Follow these steps: Begin by locating the last occurrence of each character within the string. Determine the lists of intervals. From these lists, identify the maximum number of non-overlapping intervals. Finally, the substrings corresponding to those intervals will be produced.

Consider the string "abac". Based on the enumeration outlined above: The final occurrence of each character is: {'a':3, 'b':1, 'c':4} The intervals identified are: [[0,3], [1,1], [2,4]] From these intervals, the maximum number of non-overlapping ones is [[0, 3], [2, 4]]. This shows that the substrings encompass all instances of each character. The resulting substrings are: ['abac']

As another example, take the string "abcabc". The final position of each character is: {'a':3, 'b':4, 'c':5} The intervals identified are: [[0,3], [1,4], [2,5]] The greatest number of non-overlapping intervals is [[0,3]], which shows that one substring encompasses all characters. This results in the substring: ['abcabc']