摘要：
C. Constanze's Machine Constanze is the smartest girl in her village but she has bad eyesight. One day, she was able to invent an incredible machine! 阅读全文
摘要：
F. Tree Factory Bytelandian Tree Factory produces trees for all kinds of industrial applications. You have been tasked with optimizing the production 阅读全文
摘要：
E. Rock Is Push You are at the top left cell (1,1) of an n×m labyrinth. Your goal is to get to the bottom right cell (n,m). You can only move right or 阅读全文
摘要：
B2. TV Subscriptions (Hard Version) The only difference between easy and hard versions is constraints. The BerTV channel every day broadcasts one epis 阅读全文