05 2018 档案

摘要：6492: Connectivity 题目描述 There are N cities. There are also K roads and L railways, extending between the cities. The i-th road bidirectionally connect 阅读全文

摘要：6990: Sequence II 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 阅读全文

摘要：4981: Collatz Conjecture 题目描述 In 1978 AD the great Sir Isaac Newton, whilst proving that P is a strict superset of N P, defined the Beta Alpha Pi Zeta 阅读全文

摘要：4990: Lemonade Trade 题目描述 The lunch break just started! Your mother gave you one litre of pink lemonade. You do not like pink lemonade and want blue l 阅读全文

摘要：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 be pos 阅读全文