考虑对于$\{a_{i+1},...,a_{n}\}$,在其前面插入$a_{i}$对$x_{i}$的影响(不考虑$a_{1}$到$a_{i-1}$): 1.$x_{i}=0$,因为其前面没有数字了 2.若$a_{j}+Tx_{j}>a_{i}-T$,则令$x_{j}$加1(字典序最大) 3.若$a_{j}+Tx_{j}\le a_{i}-T$,则$x_{j}$不变 这些操作对于$j$而言是独立的,因此依次遍历$\{a_{j-1},a_{j-2},...,a_{1}\}$即可确定$a_{j}$ 对…

本文转载请注明出处 —— polobymulberry-博客园 问题描述 我在User表中增加了两个列,分别为“我关注的人”(Relation关系)和“我的粉丝”(Relation关系)当我关注某个人的时候,一方面我要添加他到“我关注的人”,另一方面在他的粉丝中要将我添加上去.看起来很简单,但是实际中操作时,使用bmob sdk中的updateInBackgroundWithResultBlock会遇到我想更新别人的User信息,是无法成功的,因为权!限! 解决方法 这里就得使用Bmob给我们提…

前段时间比较忙,就没有坚持写博客,但发现这周末再想捡起来,好难,一直到了今天晚上,才决定坐下来写一篇,哈哈哈-- 最近在用 Laravel 5.2,踩了几个关于 Relation 的坑,在这里用博客记录一下. 如果大家不了解 Laravel 的 Relation 的话,可以查看文档Eloquent: Relationships. 在数据库中先创建两张表 users 和 password_resets,分别代表用户和重置密码,假设他们的关系是一对多,一个用户有多个重置密码记录. 我们可以使用 La…

1.题目描述: 1175. Strange Sequence Time limit: 1.0 secondMemory limit: 2 MB You have been asked to discover some important properties of one strange sequences set. Each sequence of the parameterized set is given by a recurrent formula: Xn+1 = F(Xn-1, Xn)…

C. Efim and Strange Grade time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Efim just received his grade for the last test. He studies in a special school and his grade can be equal to any po…

题目链接: 传送门 A strange lift Time Limit: 1000MS     Memory Limit: 32768 K Description There is a strange lift.The lift can stop can at every floor as you want, and there is a number Ki(0 <= Ki <= N) on every floor.The lift have just two buttons: up and…

Strange fuction Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5933 Accepted Submission(s): 4194 Problem Description Now, here is a fuction: F(x) = 6 * x^7+8*x^6+7*x^3+5*x^2-y*x (0 <= x <=100) C…

在apicloud的数据库中,pointer和relation是在很难让人理解. 通过不断的实践,终于有点明白了. pointer和relation作用:在nosql数据库中实现表之间的关联 首先来说说pointer 官方文档上说"pointer用于表与表之间建立一对一的关系",太粗糙了. 要理解pointer,最好从pointer的使用方法开始 如果我要在user的基础上增加钱包属性,我可以直接创建一个新的列wallet,数值类型. 可是,如果这么做的话,我的wallet只能存放一个…

Description Elina is reading a book written by Rujia Liu, which introduces a strange way to express non-negative integers. The way is described as following: Choose k different positive integers a1, a2, …, ak. For some non-negative m, divide it by ev…

Problem Description There is a strange lift.The lift can stop can at every floor as you want, and there is a number Ki(0 <= Ki <= N) on every floor.The lift have just two buttons: up and down.When you at floor i,if you press the button "UP"…