题意: 给定一个序列,询问区间中最大数减去最小数的结果 和2104差不多, 代码贴过来就OK了 #include <iostream> #include <algorithm> using namespace std; ; ][M], tree[][M], sorted[M]; void build(int level, int left, int right) { if (left == right) return; ; ; for (i=left; i<=right; i…

K-th Number Time Limit: 20000MS   Memory Limit: 65536K Total Submissions: 51732   Accepted: 17722 Case Time Limit: 2000MS Description You are working for Macrohard company in data structures department. After failing your previous task about key inse…

题意:给n个数,m次询问,每次询问L到R中第k小的数是哪个 算法1:划分树 #include<cstdio> #include<cstring> #include<algorithm> #include<iostream> using namespace std; ; ][mx]; int sortt[mx]; ][mx]; void build(int l,int r,int c) { if (l==r) return ; ; ; ; for (int i…

K-th Number Time Limit: 20000MS   Memory Limit: 65536K Total Submissions: 47066   Accepted: 15743 Case Time Limit: 2000MS Description You are working for Macrohard company in data structures department. After failing your previous task about key inse…

K-th Number Time Limit: 20000MS   Memory Limit: 65536K Total Submissions: 35653   Accepted: 11382 Case Time Limit: 2000MS Description You are working for Macrohard company in data structures department. After failing your previous task about key inse…

Boring Counting Time Limit: 3000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述     In this problem you are given a number sequence P consisting of N integer and Pi is the ith element in the sequence. Now you task is to answer a list of queries, for each…

题意:查询区间中位数 思路:模板题,相当于区间第K大的数,主席树可以水过,但划分树是正解.但还没搞明白划分树,先上模板 #include <iostream> #include <cstdio> #include <cmath> #include <cstring> #include <cstdlib> #include <string> #include <vector> #include <algorithm&g…

题目链接:  http://acm.hdu.edu.cn/showproblem.php?pid=4417 题目大意:给定一个区间,以及一个k值,求该区间内小于等于k值的数的个数.注意区间是从0开始的. 解题思路: 首先这题线段树可以解.方法是维护一个区间最大值max,一个区间点个数s,如果k>max,则ans=s+Q(rson),否则ans=Q(lson). 然后也可以用求区间第K大的划分树来解决,在对原来求第K大的基础上改改就行,方法如下: Build方法同第K大. 对于Query: ①左区…

题目链接 参考HH大神的模版.对其中一些转移,还没想清楚,大体明白上是怎么回事了,划分树就是类似快排,但有点点区别的.多做几个题,慢慢理解. #include <cstdio> #include <cstring> #include <algorithm> using namespace std; #define lson l,m,rt<<1 #define rson m+1,r,rt<<1|1 #define N 100100 struct n…

//Accepted 14796 KB 453 ms //划分树 //把查询的次数m打成n,也是醉了一晚上!!! //二分l--r区间第k大的数和h比较 #include <cstdio> #include <cstring> #include <iostream> #include <queue> #include <cmath> #include <algorithm> using namespace std; /** * Thi…