at t independence mo

Title Link: Http://codeforces.com/problemset/problem/617/ETitle:Here you A1 A2 A3 An number, M inquiry: in [L, R] inside how much [L, R] makes Al xor al+1 xor AR is k.The following:in the subject only interval query has no interval modification, and the amount of data is small (10w　　 ), so it can be solved in an offline way. Using the MO team algorithm to solve, you need O (1) Modification [L, r+1], [L, R-1], [L+1, R], [L-1, R].Detailed

Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=6333Tips for solving problems: This problem can be said to be very wonderful, first push combinatorial mathematical formula, one of the most important formula is CNm = Cmn-1 + Cm-1n-1 This formula know Yang Hui Triangle is understood, but a look found nothing to use. However, the formula can be used as a basis for further deduction. Set snm = cn1 + CN2 + CN3 + ... CnM then continue using the basic formula above can be converted into

"Algorithm One"Violence.Can pass the No. 0,1 test point. Estimated score: a score of. "Algorithm Two"Classic question: Interval number, data range is not very large, so we can:① block, discretization, preprocessing: The number of x occurrences in the i block ( differential );I to block J is who, how many times have appeared. When asked, the answer to the whole block is directly answered; for scattered parts, the number of occurrences of each number of violent statistics, coupled with the result

Mo team Dafa Good, divided into pieces together.Far brother out of the problem, did not do it, today only learn Mo team.If [L,r], [l,r+1] can be found in the O (1) time, you can sqrt (n) after the block, the query sort updates.Because I write too ugly, I have to use the input plug before.Complexity of MSQRT (n)Code:#include csu1515 squence-Mo Team algorithm

Well, we've been able to handle queries on the linear structure through team mo.But how is this possible? = =Now the problem is basically involved in the modification operation Ah ...For example, there will be a "change the value of node x to y operation" ...And we know, MO team is an off-line algorithm, in order to read all the operations, then the modification operation will affect the subsequent query operations.How can this impact be eliminated?We

51nod 1290 counting Diff Pairs | Mo Team Tree-like arraySurfaceA positive integer of length n array A, given a number K and q query, each query contains 2 number L and r, for each query output from a[i] to a[j], the number of logarithm, ABS (A[i]-a[j]) ExercisesMO Team! In fact, I was searching for "51nod + MO Team" to find this problem ...Level Seven algorithm problem!320 points!You deserve it!The puzzle i

It was a long time ago when I foolishly looked at strange sources of information and was knocked out by all sorts of Manhattan.and Now we're going to learn the Chunking method. Another new creation of a chunking method.Let's consider such an interval to ask questions ...It has the following properties:0,n number, q a query.1, it has no modification operation, which means we can play with the inquiry in the order we like. we can actually play in any order.2, we can easily find the values of [l±1

Question: Give some numbers, ask how many different values are in an interval, and how many different values are in an interval.Idea: Because there is no modification, so I think of the MO team algorithm. Then I wrote the 5k+ Manhattan distance to the smallest spanning tree and then decisively T. (100s time limit ah, brush the status of the brush is crazy.), the result of the last added handwriting read-in also failed a). Later decisively give up, wro

What is Mo team, is violence!!! After learning a lot of people will say that, is a very fascinated by the nature of optimization, optimized you do not know why the optimization.The efficiency of the MO team algorithm depends on the way you block it, so let's see how the team is optimized.First Look at a question: Little B's inquiryTitle DescriptionSmall B has a sequence that contains an integer between N 1~

Baidu on-line, the algorithm is a call Mo Tao Daniel study out of the orz~ to see some cows and cows blog, also probably understand the algorithm.Let's start by talking about the function of this algorithm:The n^1.5 algorithm can find out the number of occurrences of a number in the interval [l,r] in the complexity of O (a). But the operation is offline, because the algorithm is based on this property.If we already know the number of occurrences of th

Mo Ge: "App self-promotion" serialized 2 people walking and migrating, "app self-promotion" upright [Mo Ge: 1 million articles per day] As mentioned in the previous article, voice is a magical thing in ancient times. It can quickly spread information to other places, breaking through a short distance. However, the descendants of the experts directly learned to walk upright. They started to walk out of Afric