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思路: 题目链接http://poj.openjudge.cn/practice/C18H/ 用2147483647除以最大素因子. 这里用了Pollard_rho因子分解算法,模板参考了http://www.cnblogs.com/kuangbin/archive/2012/08/19/2646396.html 实现: #include <stdio.h> #include <string.h> #include <stdlib.h> #include <tim…
http://poj.openjudge.cn/practice/C18H 题目 算平均数用到公式\[\bar{x}=\frac{x_1+x_2+x_3+\cdots+x_n}{n}\] 但如果用int型计算,那么\(x_1+x_2+x_3+\cdots+x_n\)可能会超过\(2^{31}-1\) 算6个数的平均数可以这么算 Calculate the average of\(x_1,x_2,x_3\)\[\bar{x}_1=\frac{x_1+x_2+x_3}{3}\]Calculate t…
1. 问题引入 最近参选了学堂在线的课程数据结构(2015秋).课程由清华大学的邓俊辉老师主讲,在完成课后作业时,遇到了这样一个题目范围查询.在这个题目中,我需要解决这样一个子问题:给定了一组已经排好序的整数集合A[0...n]和一组闭区间[L,R],求这个整数集合中落在这个区间中的点的个数.解决这个问题,我们很容易想到查找效率很高的二分查找,但是这又不是一般求key是否在一个数组里面的二分查找问题.对于区间左端点L,要找到数组里面大于或等于它的最小的元素的下标indexL.对于区间右端点R,要…
If you understand the comments below, never will you make mistakes with binary search! thanks to A simple CPP solution with lower_bound and C++ O(logn) Binary Search that handles duplicate, thanks to phu1ku 's answer on the second post. http://en.cpp…
Description Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must be going through a defiant phase: "But I want to use feet, not meters!"). Each signal seems to…
Bound Found Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 4384   Accepted: 1377   Special Judge Description Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration…
Bound Found Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 4056   Accepted: 1249   Special Judge Description Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration…
Bound Found Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 1651   Accepted: 544   Special Judge Description Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration…
Bound Found Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 5207   Accepted: 1667   Special Judge Description Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration…
Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must be going through a defiant phase: "But I want to use feet, not meters!"). Each signal seems to come in two…
00 前言 之前一直做启发式算法,最近突然对精确算法感兴趣了.但是这玩意儿说实话是真的难,刚好boss又叫我学学column generation求解VRP相关的内容.一看里面有好多知识需要重新把握,所以这段 时间就打算好好学学精确算法.届时会把学习过程记录下来,也方便大家学习! 01 什么是branch and bound(定义)? 1.1 官方一点[1] Branch and bound (BB, B&B, or BnB) is an algorithm design paradigm fo…
Bound Found Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 2277   Accepted: 703   Special Judge Description Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration…
Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must be going through a defiant phase: "But I want to use feet, not meters!"). Each signal seems to come in two…
B - Bound Found POJ - 2566 Signals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must be going through a defiant phase: "But I want to use feet, not meters!"). Each…
一.首先介绍一下什么叫尺取 过程大致分为四步: 1.初始化左右端点,即先找到一个满足条件的序列. 2.在满足条件的基础上不断扩大右端点. 3.如果第二步无法满足条件则到第四步,否则更新结果. 4.扩大左端点,并且回到第二步. 很明显如果要这样做,那么这个序列要是一个有顺序的序列,因为这样的话保证左端点不变,右端点一直向右延伸一定会使答案靠近结果.(可以看一道题理解一下) Signals of most probably extra-terrestrial origin have been rec…
/****************************************************************************** ** This file is an amalgamation of many separate C source files from SQLite ** version 3.14.1. By combining all the individual C code files into this ** single large file…
               本博客所有文章分类的总目录:[总目录]本博客博文总目录-实时更新  开源Math.NET基础数学类库使用总目录:[目录]开源Math.NET基础数学类库使用总目录 前言 真正意义上的随机数(或者随机事件)在某次产生过程中是按照实验过程中表现的分布概率随机产生的,其结果是不可预测的,是不可见的.而计算机中的随机函数是按照一定算法模拟产生的,其结果是确定的,是可见的.我们可以这样认为这个可预见的结果其出现的概率是100%.所以用计算机随机函数所产生的“随机数”并不随机,…
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