题中给出了第 i 头牛前面有多少比它矮,如果正着分析比较难找到规律.因此,采用倒着分析的方法(最后一头牛的rank可以直接得出),对于第 i 头牛来说,它的rank值为没有被占用的rank集合中的第A[i]+1大数.所以,采用树状数组维护0-1序列(表示是否被占用)的前缀和,每次再用二分得出第K大数的下标即可. 代码如下: #include <cstdio> #include <algorithm> #include <iostream> using namespace
题目链接: C. Subsequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output For the given sequence with n different elements find the number of increasing subsequences with k + 1 elements. It is
E. e-Government time limit per test:1 second memory limit per test:256 megabytes input:standard input output:standard output The best programmers of Embezzland compete to develop a part of the project called "e-Government" — the system of automa
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2227 Find the nondecreasing subsequences Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1394 Minimum Inversion Number Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 10
题目链接 https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=4923 problem description Last night, Kingdom of Light was attacked by Kingdom of Dark! The queen of Kingdom of Light, Queen Ar, was ca
The k-th Largest Group Time Limit: 2000MS Memory Limit: 131072K Total Submissions: 8807 Accepted: 2875 Description Newman likes playing with cats. He possesses lots of cats in his home. Because the number of cats is really huge, Newman wants to g