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FZU2184 Reverse Order number reduction

#include #include#include#includeusing namespacestd;inta[1005];intb[1005];intflag[1005];intMain () {intI,j,n; while(~SCANF ("%d",N) {memset (flag,0,sizeof(flag)); for(i=1; i"%d",A[i]); for(j=1; j) { intsumm=0; for(i=1; i) { if(summ0) summ++; Else if(summ==a[j]flag[i]==0) {Flag[i]=1; B[J]=i; Break; } } } for(i=1; i) { if(i"%d", B[i]); Elseprintf"%d\n", B[i]); } } return 0;}FZU2184

Sort by merge to calculate the number of reverse orders

Sort by merge to calculate the number of reverse orders #include #include #include #include #include #include #include #include #include #include #include #include #include #define eps 1e-12///#define M 1000100///#define LL __int64

Zoj 3157 calculates the ry + tree array (number of reverse orders)

Http://acm.zju.edu.cn/onlinejudge/showProblem.do? Problemid = 3128 Question: give you n straight lines (n Solution: Calculate the intersection between each line and x = L and x = R respectively, and then convert the two ends of N line segments to X = L and x = R. There are several intersections, in this way, the reverse order number is solved. #include

A tree-like array for reverse order number

The key to solving problems: discretization.#include #include#include#include#include#include#defineMAXN 500004using namespaceStd;typedefLong Longll;structnode{intId,val;} A[MAXN];intBITS[MAXN],P[MAXN];BOOLcmpConstNode a,ConstNode b) { returna.valB.val;}intN;voidAddintIintx) { while(iMAXN) {Bits[i]+=x; I+=i-i; }}intSuminti) { ints=0; while(i>0) {s+=Bits[i]; I-=i-i; } returns;}intMain () { while(SCANF ("%d", n) N) { for(intI=1; i"%d", a[i].val), a[i].id=i; Sort (a+1, a+n+1,

Oracle read the list of comments, first three by the number of points, and then sorted by creation time in reverse order, need paging ____oracle

Oracle Read the comments list, first three by the number of points, and then sorted in reverse order of creation time, required pagination: The first way: SELECT * FROM (select b.*, DECODE (rownum, 1, 1, 2, 2, 3, 3, 4) rankFrom (SELECT a.*From Act_comment_info AORDER BY a.prize_num DESC, ref desc) b) c Order by C.rank, C.ref desc; The second way: Select Aa.* from ( SELECT * from (SELECT a

[Tree array] to arrange the number of reverse order

Number of reverse order permutationsTitle DescriptionSearch engines on the internet often need to compare information, for example, by a person's ranking of something to estimate his or her interest in a variety of different information, so as to achieve personalized service.For different ranking results, you can use reverse order to evaluate the differences betw

Kendall Tau Distance: Find the number of reverse order between two permutations

Definition of Kendall tau distance The following definitions are taken from the Wiki encyclopedia Kendall tau Distance: The Kendall tau rank distance is a metric that counts the number of pairwise disagreements between the ranking lists. The larger the distance, the more dissimilar the lists is. That is, the Kendall tau distance is the number of reverse order bet

Classical algorithm (9) from the merge sort to the sequence of the reverse number pairs (Microsoft written questions)

First, look at the original question. Microsoft 2010 Writing Test In an arrangement, if the front and rear positions of a pair of numbers are the opposite of the size order, that is, the preceding number is greater than the number in the following, then they are called an inverse number pair. The total number of

Merge sort to find the reverse number (POJ 1804,poj 2299,hdu 4911)

First, two concepts are identified:In reverse order: series A[1],a[2],a[3] ... Any two numbers in A[i],a[j] (iNumber of reverse order: The total number of reverse pairs in a series.Example one: POJ 1804. Click to open linkSolution thinking: Each Exchange can only reduce one reverse

HDU 1266 Reverse number (water ver.)

http://acm.hdu.edu.cn/showproblem.php?pid=1266 Time limit:2000/1000 MS (java/others) Memory limit:65536/32768 K (java/others) Problem Description Welcome to 2006 ' 4 Computer College programming contest! Specially, I give my best regards to all freshmen! You are the future of HDU acm! And now, I must tell your that ACM problems are always is not so easy, but, except this one ... ha-ha! Give an integer; Your task is to output its reverse

POJ 2299 Ultra-quicksort Seeking reverse order number, tree array solution, detailed analysis

to say the tree array to find the inverse number of the method, the number of reverse order definition: Click to open the linkAfter reading the definition of reverse number, first of all, from the definition, we can actually convert, there is a sequence an, assuming that th

[Introduction to algorithms] practice 2-4.D The number of reverse pairs in permutations

Title: Gives an algorithm for determining the number of inverse pairs in any permutation of n different elements, with the worst case requiring Θ(NLGN) time. (Hint: Modify merge sort.) ) Idea: Modify the merge sort from large to small sort.Merge sorting is divided into three steps: decomposition, resolution, and merging.Decomposition: The permutation A is decomposed into A1,A2 two sub-permutations. Settlement: The recursion from large to small arra

Fzu (2184)--Reverse order number reduction __ACM

Problem 2184 Reverse number restore Accept:8 submit:15Time limit:1000 mSec Memory limit:32768 KB Problem Description For a while Eric was interested in the number of reverse numbers, and he began to solve many of the sequence's reverse numbers (for an array of arrays A of

HDU 5147 Sequence II (number of reverse order in a tree-like array)

divide the four-tuple into two-tuple to deal with, the decomposition of the method is to enumerate the array into two parts, and then to each part of the tree-like array to find the reverse number, the result is multiplied by the number of the four-tuple that satisfies the condition. the way to find the inverse number

POJ2299 Ultra-quicksort "tree-like array" "Reverse order Number"

Topic Links:http://poj.org/problem?id=2299Main topic:Give you a sequence of n integers that can only be exchanged for adjacent numbers and eventually into ascending order, Q: How many interchanges are required at least.Ideas:is to ask the number of times the bubble sort is exchanged. In fact, it is to find the inverse number of the original sequence. It can be done with merge sort, line tree, tree array.But

C Language Combat reverse a three-digit number

, very urgent, I initially want to use the character output, the program crashed, unsuccessful. Later a thought, since already knew three position the numerical value, then the direct three position the number adds a bit to be OK, anyway the result has not changed, for example input 700, then C equals 7 b equals 0 A equals 0, then after the reverse order this number

POJ3067 Japan "Tree array" "Reverse order Number"

Topic Links:http://poj.org/problem?id=3067Main topic:There are two rows of cities, a row of N cities, numbered 1~n, a row of M cities, numbered 1~m. There are K roads between the two rows of cities.The road is connected in a straight line, Q: How many roads are intersected by these roads, and the focus is not the point at which the city resides, find the number of intersections. Ideas:The idea of a tree-like array. Refer to the diagram on the net, fir

Exercise 7-3 storing the number in reverse order (20 points) in an array

This requires writing a program, storing the given n integers in an array, holding the number of n in an array in reverse order, and then outputting the elements in the array sequentially. Input format:The input gives a positive integer N (1≤n≤10) in the first row. The second line enters n integers, separated by a space. Output format:Outputs the result of the processing of these n integers i

Ultra-quicksort (merge sort, reverse order number)

The title is described in the this problem, and you has to analyze a particular sorting algorithm. The algorithm processes a sequence of n distinct integers by swapping, adjacent sequence elements until the sequence is Sorted in ascending order. For the input sequence9 1 0 5 4,Ultra-quicksort produces the output0 1 4 5 9.Your task is to determine what many swap operations Ultra-quicksort needs to perform in order to sort a given input sequenc E.Enter the input contains several test cases. Every

01_ Merge sort for reverse order number (example: Blue Bridge cup-children queue)

} AboutSort (b +1, b+n+1); the for(i=1; i//re-numbering the a[] the { theK =Erfen (B,a[i]); +A[i] =K; -b[k]--; theNUM[A[I]].I =i;Bayi } theMerge (A,1, n);//Merge and Beg all children's high theAns =0; - for(i=1; i) - { theK = num[i].i;//k denotes the position of the low child in the team thew = i;//W means the lower of the W theNum[i].low = W1-(K-1-Num[i].high); thet = Num[i].high +Num[i].low; -Ans + = t* (t+1)/2; the } theprintf"%i64d\n

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