显然奇序列中,逆序对的个数为奇数;偶序列中,逆序对的个数为偶。当n为奇数时,3*n为奇,7*n+1为偶;n为偶数时正好相反。 用树状数组或归并排序求逆序对即可。 #include<iostream>#include<stdio.h>#include<cstring>#include<stack>#include<algorithm>#include<vector>usingnamespace
Usage: maze [options] Options: -h, --help Show this help message and exit -a, --algorithm <alg> Algorithm to use (dfs, kruskal) -s, --size <width> <height> Size of the maze in cells -b, --begin <x> <y> Start point of the maze -e, --end <x> <y> End point of the...
const int N=1e6+10; int s[N],n,a[N];ll ans; inline void add(int x,int v){ while(x<=n) s[x]+=v,x+=x&-x; } inline int query(int x){ ll tmp=0; while(x) tmp+=s[x],x-=x&-x;return tmp; } int main(){ // freopen("","r",stdin); n=read(); for (int i...
Here is my code for the Petr# problem (113B - Petr#) importjava.util.*;publicclassB{publicstaticvoidmain(String[]args){Scannersc=newScanner(System.in);Stringinput=sc.next();Stringstart=sc.next();Stringfinish=sc.next();ArrayList<Integer>s=newArrayList<Integer>();ArrayList<Integer>e=newArra...
#include <iostream>#include<vector>#include<algorithm>#include<string>#include<set>#include<queue>#include<map>#include<sstream>#include<cstdio>#include<cstring>#include<numeric>#include<cmath>#include<unordered_set>#definell long longusingnamespacestd;intdir[4][2] = { {1,0},{-1,0},{0...
Unlike histograms,TGraphpoints are not necessarily stored in memory in ascending "X" coordinate pattern. Generaly speaking, when adding points to theTGraph, they are not sorted with respect to their X values. I noticed that this breaks the fitting algorithm. ...
Copy-and-Patch Compilation - A fast compilation algorithm for high-level languages and bytecode (2021)(arxiv.org) Tidy Tuples and Flying Start: fast compilation and fast execution of relational queries in Umbra (2021)(springer.com) Optimizing Relational Query Engine Architecture for Modern Hardware...
4) maximum spectra algorithm 最大干涉频谱法 1. This paper presents an image registration method using a maximum spectra algorithm that reduces the search range,accelerates the search speed and improves precision. 在分析InSAS复图像数据特点的基础上给出一种实用的基于最大干涉频谱法的复图像配准方法,...
approximation algorithm Approximation and Interpolation of Functions Approximation Formula Approximation of Functions of a Complex Variable approximation property apps on tap appulse appurtenance appurtenant structure App-V AppWare APPX appz APR APRA
The modeling of the OPEC electricity utilization forecast depends on the Cuckoo Search Algorithm by means of L茅vy flights. The proposed method is found to be efficient, operative, consistent, and robust compared to the electricity consumption forecasting methods that have already been discussed by ...