SCUT_Pein

Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from smallest to largest. For example, the sorted sequence

#include using namespace std; int A[500008],AA[500008]; long long int sum; void merge_sort(int *A,int x,int y,int *T) { if(y-x>=1) { int m=x+(y-x)/2; int p=x,q=m+1,i=x; merge_sort(A,x,m,T);

本文主要摘自刘汝佳的《算法竞赛入门经典》。我只是加上我看时的一些感悟。 按照分治三步法，对归并排序算法介绍如下： 划分问题：把序列分成元素个数尽量相等的两半。 递归问题：把两半元素分别排序 合并问题：把两个有序表合并成一个。。（这里需要排序。但是因为两半都是从小到大排序好的，所以我们每次都拿两边最小的元素进行比较，拿小的放左边。用了的元素删掉。接着继续找） 接下来，先亮上刘汝佳的代码。

Description In this problem, you have to analyze a particular sorting algorithm. The algorithm processes a sequence of n distinct integers by swapping two adjacent sequence elements until the seque

Description Windy has N balls of distinct weights from 1 unit to N units. Now he tries to label them with 1 to N in such a way that: No two balls share the same label.The labeling satisfies

Description Order is an important concept in mathematics and in computer science. For example, Zorn's Lemma states: ``a partially ordered set in which every chain has an upper bound contains a maxima

Description The system of Martians' blood relations is confusing enough. Actually, Martians bud when they want and where they want. They gather together in different groups, so that a Martian can hav

Description Boudreaux likes to multitask, especially when it comes to using his computer. Never satisfied with just running one application at a time, he usually runs nine applications, each in its o

Description They are N segments in x-axis, each segment has a start point X, a end point Y, so it can express as [X, Y]. Now you should select two segments, they have the longest overlap lengt

Mashmokh and Reverse Operation time limit per test 4 seconds memory limit per test 512 megabytes input standard input output standard output Mashmokh's boss, Bimokh, did