选择其中卡片总数较少的一类,当相同时选择$t_{1}$所对应的一类(以下记作$A$类) 如果$t_{1}$不是$A$类,就先对$t_{1}$操作一次(即令$a_{1}$减少1) 下面,问题即不断删去$A$类中的一张卡片,再删除另一类中的一张卡片,直至$A$中卡片被删光 事实上,$A$类中卡片删除顺序与最终另一类卡片剩余卡片的位置无关,具体证明考虑交换$A$中两张相邻卡片的删除顺序,并分类讨论来说明不影响即可 由此,不妨假设$A$类卡片是从左到右依次删除(即删完一叠后删除下一叠),每一张删除时都找…

Disposable microfluidic devices: fabrication, function, and application Gina S. Fiorini and Daniel T. Chiu BioTechniques 38:429-446 (March 2005) This review article describes recent developments in microfluidics, with special emphasis on disposable p…

1.text translation Two hundred years ago, boxing matches were very popular in England. At that time/In those days, boxers fought for prize with bare fists. Because of /By reason of/On account of this, they were known as 'prizefighter'.However, boxing…

https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.7/p5.js http://www.box2d.org http://www.jbox2d.org http://github.com/shiffman/PBox2D 第0章 引言 (已看) 第1章 向量 (已看) 第2章 力 (已看) 第3章 震荡  (已看) 第4章 粒子系统 (已看) 第5章 物理函数库 (已看) 第6章 自治智能体 (已看) 第7章 细胞自动机 (已看) 第8章 分形 (已…

                                 Bad Day Bad Day (坏天气) 来自 Daniel Powter -- 2005年MTV欧洲音乐奖提名最佳新人, 出自专辑 DANIEL POWTER-- 2005 年荣获英国金榜第五名,这首歌被可口可乐 选为广告宣传曲. Where is the moment when needed the most? You kick up the leaves and the magic is lost Tell me your…

lesson 21 Daniel Mendoza bare 赤裸的 :boxers fought with bare fists crude 天然的:crude sugar, crude oil 粗俗的:A crude manner figure: someone who is important or famous in someway draw up 起草 draw up a contract/will/list/plan 表示喜欢的词语 like/be interested in be f…

F. Daniel and Spring Cleaning While doing some spring cleaning, Daniel found an old calculator that he loves so much. However, it seems like it is broken. When he tries to compute 1+3 using the calculator, he gets 2 instead of 4. But when he tries co…

CF1245F: Daniel and Spring Cleaning 题意描述: 给定区间\([L,R]\),其中 \((0\leq L,R\leq 10^9)\),问在区间内有多少数对\((x,y)\)满足\(x+y==x\land y\). 输入描述: 第一行输入一个\(T\)表示测试样例数目. 接下来每一个测试样例输入两个整数\(L,R\)表示区间. 输出描述: 输出一个整数表示答案. 思路: 首先对条件进行变形. \(x+y==x\land y\),有\(x\&y==0\),证明略.…

ABSTRACT: Daniel Robbins is best known as the creator of Gentoo Linux and author of many IBM developerWorks articles about Linux. Daniel currently serves as Benevolent Dictator for Life (BDFL) of Funtoo Linux. Funtoo Linux is a Gentoo-based distribut…

ABSTRACT: Daniel Robbins is best known as the creator of Gentoo Linux and author of many IBM developerWorks articles about Linux. Daniel currently serves as Benevolent Dictator for Life (BDFL) of Funtoo Linux. Funtoo Linux is a Gentoo-based distribut…