If the first two digits in the array are greater than the subsequent digits, the two digits form a reverse order pair, enter an array, and find the total number of the reverse order pairs of the array.
Train of Thought: Use the merged sorting of
Array in reverse order, the array initialized on the host is transmitted to the device, and then the Cuda parallel reverse order is used. At this time, the operation is performed on the global memory, and then the result is returned to the host for
The basic idea is to find the reverse order number and then sort it by the reverse order number. The following problems occur:
1. The main problem with this question is that m and n are always mixed, and a runtime error occurs during the submission,
T4: Use a tree array to find reverse order PairsA [I] is the prefix andDerivation (A [J]-A [I])/(J-I)> = mA [J]-A [I]> = m (J-I)A [J]-M * j> = A [I]-M * IB [J]> = B [I]This is the reverse order.Next, let's learn how to use a tree array.The principle
Question: two numbers in the array. If the first number is greater than the next number, the two numbers form a reverse order.
Problem Analysis:
First, we should think of a very simple solution, traversing the array in sequence, comparing the
Question: give a number of columns, A1, A2,... to an, and find its reverse logarithm. The reverse order is that subscript I is smaller than J, but the value of AI is larger than a J. N can be 0.1 million tall.
Ideas:
(1) It is unrealistic to make a
Title Link: https://www.51nod.com/onlineJudge/questionCode.html#!problemId=1019Test instructions: In one arrangement, if the front and back positions of a pair of numbers are opposite the size order, that is, the previous number is greater than the
title link : http://acm.hdu.edu.cn/showproblem.php?pid=4911The main problem : Can exchange a maximum of k times, the minimum number of reverse logarithmProblem Solving Ideas :The inverse number theorem, when the inverse logarithm is greater than 0 o'
Minimum Inversion numberTime limit:1 Sec Memory limit:256 MBTopic Connectionhttp://acm.hdu.edu.cn/showproblem.php?pid=1394DescriptionThe inversion number of a given number sequence A1, A2, ..., is the number of pairs (AI, AJ) that satisfy I AJ.For
PackageCom.cn.gao;//Insert Sort Reverse order Public classInsertionsort { Public Static Final intsize=10; //Insert sort reverse order algorithm Public Static voidInsertionsort (intA[],intN) { inti,j,temp; for(i=1;i) {Temp=A[i]; for(j=i-1
Topic:in the array of two digits, if the previous number is greater than the number that follows, then these two numbers form an inverse pair. Enter an array to find the total number of reverse pairs in this array p. and the output of p to 1000000007
1. Merge sortPoints:Merge sort is an effective algorithm based on merging operation, which is a typical application of divide-and-conquer method.Basic idea:(1) Decomposition: Divides the sequence each binary into two arrays, until it is divided into
First you need a node to implement a single linked list.
Package Com.lxk.linkedList.oneWay;
/**
* @author lxk on 2017/8/1
/public class node {
private final K key;
private V value;
Private Node next;
Public Node (K key, V value,
The reverse order in the arrayThe flexible use of the merging algorithm before listening to seniors said this is used to calculate the reverse order is very useful has not been achieved this time although the game did not go to do after their own
Title: Segment Tree-minimum number of reverse orderDate:2018-10-12 17:19:16Tags
Acm
Algorithm
Brush questionsCategories
acm-segment Tree
OverviewThis is a simple line-of-tree problem, and, of course, there are many other
C # programming: given a positive integer, the number of digits is obtained and output in reverse order,
Step 1: Convert the input number into a string n. toString () Step 2: Obtain the length of the string, that is, the number of digits in a
//// In reverse order of words, the punctuation is in non-reverse order. example: // "ABC def GH. \ nabc def GH. "The Reverse Order is" GH. def ABC \ ngh. def ABC "// method: first put the letters in the sentence upside down, and then put each word
At first do not know the merger sort, so this question on all kinds of fancy T, the best 1015ms, is also drunk.Here's the idea: Insert the first number with , then enter the number in turn to compare the elements in , and if you Then the number of
Number of reverse order = Inverse number of two sub-sequences + inverse number of this sequenceWe know that when the sequence is sorted by two-way merging, the sequence is split into several sub-sequences, the sub-sequences are sorted first, and the
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