dex reverse number

#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 #include #include #include #include #include #include #include #include #include #include #include #include #include #define eps 1e-12///#define M 1000100///#define LL __int64

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

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 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

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

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

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

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