摘要：题目描述 Alice and Bob are playing a stone game. There are n piles of stones. In each turn, a player can remove some stones from a pile (the number must b 阅读全文

摘要：题目描述 We define an element ai in a sequence "good", if and only if there exists a j(1≤ j < i) such that aj < ai.Given a permutation p of integers from 阅读全文