As you are probably well aware, in Byteland it is always the military officer's main worry to order his soldiers on parade correctly. In Bitland ordering soldiers is not really such a problem. If a platoon consists of n men, all of them have differen…

题意:设原数组为a[i],pos[i]代表第 i 个位置之前有多少个数比a[i]大,求原数组a[i]. 这个题意是看了别人的题解才明白,我自己没读出来…… 方法:假设我们从左往右放,因为后面的数还有可能影响前面的数的位置,所以在最后一个数放完之前,我们没法确定每个数的位置,所以我们反过来考虑,从右往左放.因为每个数前面比它大的数的个数pos[i]已知,我们可以不必关心这些数的具体数值,从而转化为它从右往左走了多少个空格,即pos[i]个,因此这个数放在第 pos[i] + 1 个空格位置上.这个…

ORDERS - Ordering the Soldiers As you are probably well aware, in Byteland it is always the military officer's main worry to order his soldiers on parade correctly. In Bitland ordering soldiers is not really such a problem. If a platoon consists of n…

题目:http://www.spoj.com/problems/ORDERS/ and pid=2852">http://acm.hdu.edu.cn/showproblem.php? pid=2852 题意:spoj227:告诉每一个位置前面有多少个数比当前位置小,求出原序列. hdu2852:设计一个容器,支持几种操作:添加/删除元素,求容器中比a大的数中第k小的数是多少. 分析:两个题思路都是求数组里面的第K小的数.開始一直在找O(N*logN)的方法,后来发现O(N*logN*lo…

CodeChef:ORDERS 简化题意: \(n\) 个人排队,给定每个人需要向左移动几个,求最终排列. 即还原逆序对. 错误想法 既然知道每个人向左移动 \(a_i\) 个,那就相当于让他的排名 \(-a_i\),他前面 \(a_i\) 个人的排名 \(+1\),差分即可. 问题在于他前面的 \(a_i\) 应是前面的人排好后的后 \(a_i\) 个,直接差分则是原序列中的. sol 考虑倒着做.最后一个人的排名显然是 \(n-a_n\),则第 \(n-1\) 个人则是剩余排名中第 \(n-…

http://poj.org/problem?id=1731 Orders Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9702   Accepted: 5925 Description The stores manager has sorted all kinds of goods in an alphabetical order of their labels. All the kinds having label…

关于排序 Guava的链式比较器 例子 assertTrue(byLengthOrdering.reverse().isOrdered(list)); 梗概 Ordering是Guava的链式比较器类,可以被用作构造复杂的比较器,并应用到collection对象. 它的本质就仅仅是一个特殊的比较器实例.Ordering仅仅是执行一些依赖一个比较器的方法(譬如 Collections.max),并且把这些方法作为实例的的方法使用.Ordering类提供一些方法去调整和加强已经存在的比较器. 怎样创…

Guava's fluent comparator class, Ordering, explained. explained Updated Jun 27, 2013 by cpov...@google.com Example 例子 assertTrue(byLengthOrdering.reverse().isOrdered(list)); Overview 总览 Ordering is Guava's "fluent" Comparator class, which can be…

CHAPTER 19 Ordering the World 第19章 分类世界 Our planet is home to a bewildering variety of plants and animals. We still don't know exactly how many insects or sea creatures there are. We rightly worry that the human race is reducing their number. ‘Endang…

The stores manager has sorted all kinds of goods in an alphabetical order of their labels. All the kinds having labels starting with the same letter are stored in the same warehouse (i.e. in the same building) labelled with this letter. During the da…