Queue-jumpers Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3348 Accepted Submission(s): 904 Problem Description Ponyo and Garfield are waiting outside the box-office for their favorite mo…
此题题意很好懂: 给你N个数,Q个操作,操作有两种,‘Q a b ’是询问a~b这段数的和,‘C a b c’是把a~b这段数都加上c. 需要用到线段树的,update:成段增减,query:区间求和 介绍Lazy思想:lazy-tag思想,记录每一个线段树节点的变化值,当这部分线段的一致性被破坏我们就将这个变化值传递给子区间,大大增加了线段树的效率. 在此通俗的解释我理解的Lazy意思,比如现在需要对[a,b]区间值进行加c操作,那么就从根节点[1,n]开始调用update函数进行操作,如果…
引言 最近偶遇apache开发的工作java工具包,一使用,就发现自己爱上它了.不多说了,下面介绍org.apache.commons.lang3.time包中处理java程序员为之头疼的时间的类. 附上官网jar包下载地址:http://commons.apache.org/proper/commons-lang/download_lang.cgi 在这之前还是先简单说一下java本身的时间处理类. Date Date的绝大部分 API 都deprecated(过时)了,以下是目前可以使用…
Sequence operation Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 7452 Accepted Submission(s): 2220 Problem Description lxhgww got a sequence contains n characters which are all '0's or '1…
D. Bash and a Tough Math Puzzle time limit per test 2.5 seconds memory limit per test 256 megabytes input standard input output standard output Bash likes playing with arrays. He has an array a1, a2, ... an of n integers. He likes to guess the greate…
The New Year holidays are over, but Resha doesn't want to throw away the New Year tree. He invited his best friends Kerim and Gural to help him to redecorate the New Year tree. The New Year tree is an undirected tree with n vertices and root in the v…
相应POJ题目:点击打开链接 SuperMemo Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 11309 Accepted: 3545 Case Time Limit: 2000MS Description Your friend, Jackson is invited to a TV show called SuperMemo in which the participant is told to play a…