Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number in a given interval. The other is to ask for the sum of numbers in a given interval. In…
1.连接查询 --创建学生表 create table students ( id int unsigned not null auto_increment primary key, name varchar(20) default '', age tinyint unsigned default 0, high decimal(5,2), gender enum('男', '女', '中性', '保密') default '保密', cls_id int unsigned default 0,…
任意门:http://poj.org/problem?id=2528 Mayor's posters Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 77814 Accepted: 22404 Description The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign hav…
I Hate It Time Limit: 9000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 106776 Accepted Submission(s): 40096 Problem Description 很多学校流行一种比较的习惯.老师们很喜欢询问,从某某到某某当中,分数最高的是多少.这让很多学生很反感. 不管你喜不喜欢,现在需要你做的是,就是按照老师的…
A Simple Problem with Integers Time Limit: 5000MS Memory Limit: 131072K Case Time Limit: 2000MS Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some gi…
Hotel Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 13805 Accepted: 5996 Description The cows are journeying north to Thunder Bay in Canada to gain cultural enrichment and enjoy a vacation on the sunny shores of Lake Superior. Bessie…
描述 In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive metallic sticks which are of the same length. Now Pudge wants to do some operations on the hook. Let us n…
D. Events 线段树区间更新查询区间历史最小值,看似很简单的题意写了两天才写出来. 题意:n个数,Q次操作,每次操作对一个区间[l,r]的数同时加上C,然后输出这段区间的历史最小值. 思路:在线段树区间更新最值查询的基础上再用一个变量表示历史最小值,每次更新只需对当前最小值更新然后用当前最小值更新历史最小值.细节问题很不好处理,可能会有重复多次更新某个区间但是其下的子节点叶节点却没有更新,而是每次重复叠加了一个add值,这样就可能将最小值覆盖.所以我们在pushdown操作的时候应该注意如…
Segregate operations that read data from operations that update data by using separate interfaces. This pattern can maximize performance, scalability, and security; support evolution of the system over time through higher flexibility; and prevent upd…
