Solving Google Code Jam Qualification Round 2020 A-D

I try to solve Google Code Jam Qualification Round 2020 problems while explaining my thinking process. A: 00:45 B: 05:53 C: 12:10 (O(nlogn) solution) D: 26:38 Unfortunately, my solution to E is too complicated for me to explain :( If this was helpful, consider liking or subscribing! Website: https://williamlin.io/ Instagram: https://www.instagram.com/tmwilliamlin168 Twitter: https://twitter.com/tmwilliamlin168