loop

This is a question from leetcode.com. Problem Question You are given a series of video clips from a sporting event that lasted T seconds. These video clips can be overlapping with each other and have varied lengths. Each video clip clips[i] is an interval: it starts at time clips[i][0] and ends at time clips[i][1]. We can cut these clips into segments freely: for example, a clip [0, 7] can be cut into segments [0, 1] + [1, 3] + [3, 7].