57,Insert Interval,33.5%,Hard,0.012147643044749783, https://leetcode.com/problems/insert-interval
56,Merge Intervals,39.3%,Medium,0.007796972706004796, https://leetcode.com/problems/merge-intervals
42,Trapping Rain Water,48.9%,Hard,0.004350670338744988, https://leetcode.com/problems/trapping-rain-water