题解 CF576C 【Points on Plane】

【题解 CF576C 【Points on Plane】】的更多相关文章

CF576C Points on Plane 构造

正解:构造解题报告: 先放下传送门趴QAQ 话说我jio得这题好玄学啊,,,就是,我实在觉得我这题做得完美无缺了?可就是过不去,,,而且它告诉我的奇异错误是"wrong output format Unexpected end of file - int32 expected "我当场就爆哭出来了趴QAQ连错6次正确率啪叽啪叽掉啊QAQ 不管,不想做这题了,决定来摸下鱼把题解给写了QAQ 看到这题,自然而然就会想到,莫队,对趴对它其实就是个,莫队的最前面的那个分块正确性我不会分析…

题解 CF576C 【Points on Plane】

题解 CF576C [Points on Plane] 一道很好的思维题. 传送门我们看这个曼哈顿距离,显然如果有一边是按顺序排列的,显然是最优的,那另一边怎么办呢? 假如你正在\(ioi\)赛场上,此时遇到一个\(n\le 10^6\)的题目,你现在发现自己的排列最坏情况是\(O(n^2)\)的,你怎么办? 可以莫队优化! 于是复杂度降到了\(O(n\sqrt{n})\). 那么我们回来看,假设点是按\(x\)轴为关键字排序的,那么\(x\)方向产生的贡献最多是\(n\)的. 那么,算上\(…

Codeforces Round #319 (Div. 1) C. Points on Plane 分块

C. Points on Plane Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/576/problem/C Description On a plane are n points (xi, yi) with integer coordinates between 0 and 106. The distance between the two points with numbers a and…

【CodeForces】576 C. Points on Plane

[题目]C. Points on Plane [题意]给定坐标系中n个点的坐标(范围[0,10^6]),求一种 [ 连边形成链后总长度<=2.5*10^9 ] 的方案.n<=10^6. [算法]思维题(分块思想) [题解]将这个10^6*10^6的矩阵划分为1000个10^3*10^6的矩阵,第奇数个矩阵内部按y升序连边,第偶数个矩阵内部按y降序连边,两个矩阵之间就直接连边. 1.到达每个点横坐标要移动10^3,总距离10^9. 2.每个矩阵内部纵坐标要移动10^6,总距离10^9. 3.矩阵…

Codeforces Round #319 (Div. 1)C. Points on Plane 分块思想

C. Points on Plane On a plane are n points (xi, yi) with integer coordinates between 0 and 106. The distance between the two points with numbers a and bis said to be the follow…

codeforces 577E E. Points on Plane(构造+分块)

题目链接: E. Points on Plane time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output On a plane are n points (xi, yi) with integer coordinates between 0 and 106. The distance between the two points wi…