You are given a 0-indexed integer array tasks, where tasks[i] represents the difficulty level of a task. In each round, you can complete either 2 or 3 tasks of the same difficulty level. Return the minimum rounds required to complete all the tasks, or -1 if it is not possible to complete all the tasks. Example 1: <strong>Input:</strong> tasks = [2,2,3,3,2,4,4,4,4,4] <strong>Output:</strong> 4 <strong>Explanation:</strong> To complete ...