Problem Introduction An inversion of a sequence \(a_0,a_1,\cdots,a_{n-1}\) is a pair of indices \(0 \leq i < j < n\) such that \(a_i>a_j\). The number of inversions of a sequence in some sense measures how close the sequence is to being sorted. F…
For a given sequence A={a0,a1,...an−1}A={a0,a1,...an−1}, the number of pairs (i,j)(i,j) where ai>ajai>aj and i<ji<j, is called the number of inversions. The number of inversions is equal to the number of swaps of Bubble Sort defined in the fol…
For a given sequence A={a0,a1,...an−1}A={a0,a1,...an−1}, the number of pairs (i,j)(i,j) where ai>ajai>aj and i<ji<j, is called the number of inversions. The number of inversions is equal to the number of swaps of Bubble Sort defined in the fol…
Inversions After Shuffle time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a permutation of integers from 1 to n. Exactly once you apply the following operation to this permutat…
1570: Sequence Number 时间限制: 1 Sec 内存限制: 1280 MB 题目描述 In Linear algebra, we have learned the definition of inversion number: Assuming A is a ordered set with n numbers ( n > 1 ) which are different from each other. If exist positive integers i , j, (…
题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=6318 Problem Description Long long ago, there was an integer sequence a.Tonyfang think this sequence is messy, so he will count the number of inversions in this sequence. Because he is angry, you will ha…
Swaps and Inversions Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2315 Accepted Submission(s): 882 Problem Description Long long ago, there was an integer sequence a.Tonyfang think this se…
Given a list of N integers A1, A2, A3,...AN, there's a famous problem to count the number of inversions in it. An inversion is defined as a pair of indices i < j such that Ai > Aj. Now we have a new challenging problem. You are supposed to count the…
Swaps and Inversions Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3588 Accepted Submission(s): 976 Problem Description Long long ago, there was an integer sequence a.Tonyfang think this se…
