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[POJ3061]Subsequence
题目链接:http://poj.org/problem?id=3061马概上学了一下《挑战程序竞赛》中作为尺取法,本题是尺取法的一道很典型的例题。尺取法真是一个很不错的小技巧。它的重点在于线性地解决了求出了满足条件的最小区间。 1 #include 2 #include 3 #include ...
分类:其他好文   时间:2015-09-08 19:58:32    阅读次数:196
Uva Galaxy(尺取法)
题意:n颗行星,给出每个点的一维坐标,可以删去m个点,使剩下所有点到剩余点集中心的距离的平方的和最小,求该最小值;思路:尺取法,每次维护n-m个点;long long用%lld读入,但codeblocks编译会出现问题,所以用cin>>;#include#include#include#includ...
分类:其他好文   时间:2015-09-01 14:00:23    阅读次数:188
poj 2739 Sum of Consecutive Prime Numbers(尺取法)
DescriptionSome positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given pos...
分类:其他好文   时间:2015-08-28 19:27:36    阅读次数:137
poj 2100 Graveyard Design(尺取法)
DescriptionKing George has recently decided that he would like to have a new design for the royal graveyard. The graveyard must consist of several sec...
分类:其他好文   时间:2015-08-28 19:23:49    阅读次数:143
poj 2566 Bound Found(尺取法 好题)
DescriptionSignals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must ...
分类:其他好文   时间:2015-08-28 07:05:38    阅读次数:146
POJ 3276 Face The Right Way (常用技巧-尺取法)
【题目链接】:click here~~ 【题目大意】:N头牛排成一列1 【思路】:由于交换区间翻转顺序对结果没影响,所以从左往右对于需要  翻转的牛进行反转,同时记录对该区间其他牛的影响即cal中的sum, 对于最后部分无法翻转的区间检查是否有反向牛,若有则方案失败。此题思想值得细细思考,常常有一种无限状态,化为有限状态。 代码: /************** *POJ 3276 (...
分类:其他好文   时间:2015-08-26 18:00:16    阅读次数:157
离散化+线段树/二分查找/尺取法 HDOJ 4325 Flowers
题目传送门题意:给出一些花开花落的时间,问某个时间花开的有几朵分析:这题有好几种做法,正解应该是离散化坐标后用线段树成端更新和单点询问。还有排序后二分查找询问点之前总花开数和总花凋谢数,作差是当前花开的数量,放张图易理解:还有一种做法用尺取法的思想,对暴力方法优化,对询问点排序后再扫描一遍,花开+1...
分类:其他好文   时间:2015-08-25 21:10:20    阅读次数:460
poj3061(Subsequence)尺取法
Description A sequence of N positive integers (10 < N < 100 000), each of them less than or equal 10000, and a positive integer S (S < 100 000 000) are given. Write a program to find the minimal ...
分类:其他好文   时间:2015-08-15 18:27:35    阅读次数:153
poj3320(Jessica's Reading Problem)尺取法
Description Jessica's a very lovely girl wooed by lots of boys. Recently she has a problem. The final exam is coming, yet she has spent little time on it. If she wants to pass it, she has to mast...
分类:其他好文   时间:2015-08-15 18:26:09    阅读次数:115
poj 3320 尺取法
容易联想到尺取法,因为假设从第s页开始阅读至少需要读到t页才能覆盖所有知识点的话,那么如果从s+1页开始阅读,至少要读到t'>=t的位置。于是可以考虑用map维护一下。 1 #include 2 #include 3 #include 4 #include 5 using namespace...
分类:其他好文   时间:2015-08-15 10:10:16    阅读次数:156
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