摘要：You are playing a variation of game 2048. Initially you have a multiset ss of nn integers. Every integer in this multiset is a power of two. You may p 阅读全文

摘要：Monocarp has got two strings ss and tt having equal length. Both strings consist of lowercase Latin letters "a" and "b". Monocarp wants to make these 阅读全文

摘要：Background Binary trees are a common data structure in computer science. In this problem we will look at an infinite binary tree where the nodes conta 阅读全文