56. Merge Intervals 57. Insert Interval
435 Non-overlapping Intervals Greedy 452 Minimum Number of Arrows to Burst Balloons Greedy 495. Teemo Attacking
715. Range Module segment tree 1094. Car Pooling
这个问题和segment tree，greedy有很多重叠的地方
56. Merge Intervals 57. Insert Interval
435 Non-overlapping Intervals Greedy 452 Minimum Number of Arrows to Burst Balloons Greedy 495. Teemo Attacking
715. Range Module segment tree 1094. Car Pooling
这个问题和segment tree，greedy有很多重叠的地方