Assume there are many sellers and you have to find the cheapest price at any one time.\na.            The beginning and ending time/date will be given for each scenario and the goal is to have an algorithm that can generate the cheapest price a seller is offering.\nb.            So for example: For the dates of 1-3 Jan and 2-5 Jan. Find out the cheapest price the seller is giving between those dates \n\nHow to solve this efficiently?\n\nInput:\n```\narr = [{ startTime: 1, endTime: 5, price: 20 }, { startTime: 4, endTime: 6, price: 30 }, { startTime: 5, endTime: 8, price: 10 }]\n```\nResult:\n```\narr = [{ startTime: 5, endTime: 8, price: 10 }, { startTime: 1, endTime: 4, price: 20 }, { startTime: 4, endTime: 5, price: 30 }]\n```

Assume there are many sellers and you have to find the cheapest price at any one time.\na.            The beginning and ending time/date will be given for each 