由于是一个二次函数的关系,所以易证应该尽量让两组的顺序相同 然后就离散化乱搞几发,最后就变成了求逆序对的数量了 #include<bits/stdc++.h> #define pa pair<int,int> #define ll long long using namespace std; ,mod=; inline ll rd(){ ll x=;; ;c=getchar();} +c-',c=getchar(); return x*neg; } int N; pa h1[max…
对于a[],b[]两个数组,我们应选取其中一个为基准,再运用树状数组求逆序对的方法就行了. 大佬博客:https://www.cnblogs.com/luckyblock/p/11482130.html #include<bits/stdc++.h> using namespace std; typedef long long LL; const int N=1e5+10,M=1e8-3; struct node{ int val,num; }a[N],b[N]; int c[N],lsh[N…
Ultra-QuickSort Time Limit: 7000MS Memory Limit: 65536K Total Submissions: 50517 Accepted: 18534 Description In this problem, you have to analyze a particular sorting algorithm. The algorithm processes a sequence of n distinct integers by swappin…
HDU 5862 Counting Intersections(离散化+树状数组) 题目链接http://acm.split.hdu.edu.cn/showproblem.php?pid=5862 Description Given some segments which are paralleled to the coordinate axis. You need to count the number of their intersection. The input data guarant…
Ultra-QuickSort Time Limit: 7000MS Memory Limit: 65536K Total Submissions: 38258 Accepted: 13784 Description In this problem, you have to analyze a particular sorting algorithm. The algorithm processes a sequence of n distinct integers by swappin…