[题目链接] http://poj.org/problem?id=3484 [题目大意] 给出n个等差数列的首项末项和公差.求在数列中出现奇数次的数.题目保证至多只有一个数符合要求. [题解] 因为只有一个数符合要求,所以在数列中数出现次数的前缀和必定有奇偶分界线, 所以我们二分答案,计算前缀和的奇偶性进行判断,得到该数的位置. [代码] #include <cstdio> #include <algorithm> #include <cstring> using na…

Showstopper 题目大意:数据挖掘是一项很困难的事情,现在要你在一大堆数据中找出某个数重复奇数次的数(有且仅有一个),而且要你找出重复的次数. 其实我一开始是没读懂题意的...主要是我理解错object的意思了- - 这一题原理要做出来不难,其实就是二分法,对数二分就好了,因为重复奇数次的数只有一个,所以肯定存在小于等于某一个数时的数的重复次数加起来是奇数,不断二分就可 关键是是这一题的数据输入超级麻烦,他还会隔行输入....用一行或者多行来区分数据...一开始我跳进这个坑里面了..出题…

Showstopper Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 1060   Accepted: 303 Description Data-mining huge data sets can be a painful and long lasting process if we are not aware of tiny patterns existing within those data sets. One r…

Showstopper Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2236   Accepted: 662 Description Data-mining huge data sets can be a painful and long lasting process if we are not aware of tiny patterns existing within those data sets. One r…

Showstopper Description Data-mining huge data sets can be a painful and long lasting process if we are not aware of tiny patterns existing within those data sets. One reputable company has recently discovered a tiny bug in their hardware video proces…

POJ 1064 题意 有N条绳子,它们长度分别为Li.如果从它们中切割出K条长度相同的绳子的话,这K条绳子每条最长能有多长?答案保留小数点后2位. 思路 二分搜索.这里要注意精度问题,代码中有详细说明:还有printf的%.2f会四舍五入的,需要*100再取整以截取小数点后两位. #include<stdio.h> #include<string.h> #include<string> #include<iostream> #include<math…

POJ 1852 Ants POJ 2386 Lake Counting POJ 1979 Red and Black AOJ 0118 Property Distribution AOJ 0333 Ball POJ 3009 Curling 2.0 AOJ 0558 Cheese POJ 3669 Meteor Shower AOJ 0121 Seven Puzzle POJ 2718 Smallest Difference POJ 3187 Backward Digit Sums POJ 3…

Halloween treats Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 7644   Accepted: 2798   Special Judge Description Every year there is the same problem at Halloween: Each neighbour is only willing to give a certain total number of sweets…

Find a multiple Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 7192   Accepted: 3138   Special Judge Description The input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000…

The Pilots Brothers' refrigerator Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 22286   Accepted: 8603   Special Judge Description The game “The Pilots Brothers: following the stripy elephant” has a quest where a player needs to open a…