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摘要： C. Constellation Cat Noku has obtained a map of the night sky. On this map, he found a constellation with n stars numbered from 1 to n. For each i, th 阅读全文

摘要： B. Guess the Permutation Bob has a permutation of integers from 1 to n. Denote this permutation as p. The i-th element of p will be denoted as pi. For 阅读全文

摘要： A. Slime Combining Your friend recently gave you some slimes for your birthday. You have n slimes all initially with value 1. You are going to play a 阅读全文