摘要：B. Find Marbletime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputPetya and Vasya are playing a game... 阅读全文

摘要：A. Slightly Decreasing Permutationstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputPermutation p is an ordered set of integers p1, p2, ..., pn, consisting of n distinct positive integers, each of them doesn't exceed n. We'll denote the i- 阅读全文