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codeforces's Introduction

Codeforces

简单的一个分类整理

难度从0~5分类

更新时间:2018年10月22日

题号 标题 类型 难度 提示
Educational Codeforces Round 52 (Rated for Div. 2) A Vasya and Chocolate 水题 0 水题
Educational Codeforces Round 52 (Rated for Div. 2) B Vasya and Isolated Vertices 二分+图的概念 1.5 先枚举所有可能存在顶点个数所需要的边,再用二分找到对于当前边数所能构成的顶点最多的完全图,用总定点减去这个值就是最多会剩下的孤立顶点数目。最少孤立顶点直接让每个边都连上两个顶点然后拿总顶点数一减,小于0就是0,否则就输出减之前的结果
Codeforces Round #515 (Div. 3) A Vova and Train 水题 0.5 找到掩盖的区间,计算当中被遮挡住的信标,最后用总数减去即可
Codeforces Round #516 (Div. 2, by Moscow Team Olympiad) A Make a triangle! 水题 0 水题
Codeforces Round #516 (Div. 2, by Moscow Team Olympiad) B Equations of Mathematical Magic 打表找规律 1 不难发现,规律是2的(n二进制当中的1的个数)次方即为答案
Codeforces Round #516 (Div. 2, by Moscow Team Olympiad) C Oh Those Palindromes 找规律 1 ..... 一遍sort就是答案
Codeforces Round #516 (Div. 2, by Moscow Team Olympiad) D Labyrinth 01BFS 1.5 一种只带两个权值的bfs,使用双端队列维护,左右前进的点放在队尾,上下前进的点放在队头
Codeforces Round #517 (Div. 2) A Golden Plate 水题 0.5 水题
Codeforces Round #517 (Div. 2) B Curiosity Has No Limits 暴力 1.5 题目的数据范围不大,暴力枚举所有情况最后把第一个符合的情况输出就好
Codeforces Round #517 (Div. 2) C Cram Time 贪心+暴力 1.5 找到第一个可以包括所有时间的值,之后向下贪心优先第一天取即可
Educational Codeforces Round 53 A Diverse Substring 思维 0.5 想偏了其实不太好做的,过程很简单
Educational Codeforces Round 53 B Vasya and Books 模拟 0.5 怎么操作都行
Educational Codeforces Round 53 D Berland Fair 暴力 1.5 回过头来看代码,你就会发现你和第一之间要么差很多,要么就差一个暴力

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