摘要：
https://www.jisuanke.com/contest/11360/challenges 其他题慢慢补 C. Pawn‘s Revenge You are playing a special chess game against a professor and you've almost 阅读全文
摘要：
Vladimir would like to prepare a present for his wife: they have an anniversary! He decided to buy her exactly nn flowers. Vladimir went to a flower s 阅读全文
摘要：
Pasha loves to send strictly positive integers to his friends. Pasha cares about security, therefore when he wants to send an integer nn , he encrypts 阅读全文