AtCoder Beginner Contest #331 - ABCEF (Fenwick Tree on Hashes!)

We had some fun training competitive programming while solving today's AtCoder problems! Make sure you have the data structure "Fenwick Tree on Hashes" with you! Timestamps: 0:00 Intro 0:40 Problem A 2:37 Problem B 5:07 Problem C 15:20 Problem D (unsolved) 49:22 Problem F 56:29 Problem E 1:18:37 Problem D and G (discussion) 1:46:31 Explanations Frequently Asked Questions: https://github.com/mitkonikov/competitive#frequently-asked-questions Collection of Algorithms and Data Structures: https://github.com/mitkonikov/atlas