今天遇到codewars的一道题,这是链接,讲的是关于万圣节的一个题目,简单点说,就是9个包裹,一个天平,两次称的机会,怎么找出9个包裹中唯一一个较重的包裹. 像我这种年轻时候喜欢研究难题获得存在感的蠢材,觉得很开心,因为这是我为数不多还记得答案的小学题.包裹分成三堆,取两个堆一称,可以得到哪个是比较中的一堆,然后再在这个异常的堆里选择两个称,找到嫌疑犯X. 于是我开始码代码 function pick(bags, scale) { switch(scale.weigh([bags[0],bag…

关于万圣节 万圣节又叫诸圣节,在每年的11月1日,是西方的传统节日:而万圣节前夜的10月31日是这个节日最热闹的时刻.在中文里,常常把万圣节前夜(Halloween)讹译为万圣节(All Saints' Day). 为庆祝万圣节的来临,小孩会装扮成各种可爱的鬼怪向逐家逐户地敲门,要求获得糖果,否则就会捣蛋.而同时传说这一晚,各种鬼怪也会装扮成小孩混入群众之中一起庆祝万圣节的来临,而人类为了让鬼怪更融洽才装扮成各种鬼怪. 不知从何时开始,西方的节日一个个的走进了天朝,情人节.圣诞节.感恩节.万圣节…

［Daylight Saving Time］ 夏时制,又称日光节约时制.日光節約時間(英语:Daylight saving time)或夏令时间(英语:Summer time),是一种为节约能源而人为规定地方时间的制度,在这一制度实行期间所采用的统一时间称为“夏令时间”.一般在天亮早的夏季人为将时间提前一小时,可以使人早起早睡,减少照明量,以充分利用光照资源,从而节约照明用电.各个采纳夏时制的國家具体规定不同.目前全世界有近110个国家每年要实行夏令时. 具体作法是:每年从四月中旬第一个星期日的…

Preface 本着刷遍(只刷一遍)各大OJ的原则我找到了一场UOJ的比赛 无奈UOJ一般的比赛难度太大,我就精选了UER中最简单的一场打了一下,就当是CSP前的练习吧 A. [UER #5]万圣节的南瓜灯 一看就是要搞个结论的题目.首先我们看出来所有没有坏的格子要形成一棵树 那么对于\(n,m\le 1000\)的数据我们直接暴力连边并查集判断即可 然后考虑\(n,m\)较大时怎么做,我们发现树一定满足边数+1=点数,换句话说就是边数小于点数 那么我们容易发现对于\(2nm-m-4K<nm-k…

基本原理:n+1只鸽子飞回n个鸽笼至少有一个鸽笼含有不少于2只的鸽子. 很简单,应用却也很多,很巧妙,看例题: Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets on that day, no matter how many children call on him, so it…

10. Halloween 万圣节 (1) On October the 31st,across Britain and the USA,thousands of children are dressing up as monsters,ghosts and witches and going to their neighbours' houses to ask for sweets or to play tricks on them if they refuse. (2) Many house…

Halloween treats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 7644   Accepted: 2798   Special Judge Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets…

题目传送:http://acm.hdu.edu.cn/showproblem.php?pid=1808 Problem Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets on that day, no matter how many children call on him, s…

[POJ3370]&[HDU1808]Halloween treats Description -Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets on that day, no matter how many children call on him, so it may happen that a…

题目描述 Every year in Wisconsin the cows celebrate the USA autumn holiday of Halloween by dressing up in costumes and collecting candy that Farmer John leaves in the N (1 <= N <= 100,000) stalls conveniently numbered 1..N. Because the barn is not so la…