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摘要： Your little sister has been a big help today: she went into town to do all the groceries! During this grand voyage, she was accompanied by her fluffy 阅读全文

摘要： https://vj.z180.cn/c7965da2b8fbd28dfbce93c000a232e5?v=1578704227 题意： 高精度求和 思路： 用求导定义得出所求式子可化为对i^(1/3)求导的和*1e5，即求1/3*i^(-2/3)的和*1e15 1 #include <stdio. 阅读全文

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摘要： https://codeforces.com/gym/101341/problem/I 题意： 给定三个矩阵ABC，问A*b是否等于c 代码： 1 #include <stdio.h> 2 #include <string.h> 3 #include <stdlib.h> 4 5 long long 阅读全文

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摘要： There are nn points in an array with index from 11 to nn, and there are two operations to those points. 1: 1 \ x1 x marking the point xx is not availa 阅读全文

摘要： http://codeforces.com/problemset/problem/1252/H As you might already know, space has always been a problem in ICPC Jakarta. To cope with this, ICPC Ja 阅读全文

摘要： http://poj.org/problem?id=2096 Description Ivan is fond of collecting. Unlike other people who collect post stamps, coins or other material stuff, he 阅读全文

摘要： http://acm.hdu.edu.cn/downloads/CCPC2018-Hangzhou-ProblemSet.pdf 阅读全文

摘要： https://www.luogu.org/problem/P2622 题目描述 现有n盏灯，以及m个按钮。每个按钮可以同时控制这n盏灯——按下了第i个按钮，对于所有的灯都有一个效果。按下i按钮对于第j盏灯，是下面3中效果之一：如果a[i][j]为1，那么当这盏灯开了的时候，把它关上，否则不管；如果 阅读全文