Super Mario Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3313    Accepted Submission(s): 1548 Problem Description Mario is world-famous plumber. His "burly" figure and amazing jumping a…

#include<iostream> #include<string.h> #include<algorithm> #include<stdio.h> #include<vector> #define LL long long #define rep(i,j,k) for(int i=j;i<=k;i++) #define per(i,j,k) for(int i=j;i>=k;i--) #define pb push_back #d…

题意:从某个区间内最多选择k个数,使得和最大 思路:首先题目给定的数有负数,如果区间前k大出现负数,那么负数不选和更大,于是对于所有最优选择,负数不会出现,所以用0取代负数,问题便转化为区间的前k大数和. 划分树: [1  6  3  8  5  4  7  2] [6  8  5  7][1  3  4  2] [8  7][6  5][3  4][1  2] [8][7][6][5][4][3][2][1] 把快排的结果从上至下依次放入线段树,就构成了划分树,划分的意思就是选定一个数,把原序…

Mario is world-famous plumber. His “burly” figure and amazing jumping ability reminded in our memory. Now the poor princess is in trouble again and Mario needs to save his lover. We regard the road to the boss’s castle as a line (the length is n), on…

Super Mario Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3625    Accepted Submission(s): 1660 Problem Description Mario is world-famous plumber. His “burly” figure and amazing jumping ability…

Super Mario Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1437    Accepted Submission(s): 690 Problem Description Mario is world-famous plumber. His “burly” figure and amazing jumping ability…

题意:给一个数组,每次询问输出在区间[L,R]之间小于H的数字的个数. 此题可以使用划分树在线解决. 划分树可以快速查询区间第K小个数字.逆向思考,判断小于H的最大的一个数字是区间第几小数,即是答案.这一步可以使用二分搜索上界.时间复杂度是O(logn*logn). #include <iostream> #include <cstdio> #include <cstring> #include <stack> #include <algorithm&…

题意:在区间中找一个数,求出该区间每个数与这个数距离的总和,使其最小 找的数字是中位数(若是偶数个,则中间随便哪个都可)接着找到该区间比此数大的数的总和 区间中位数可以使用划分树,然后在其中记录:每层的 1-i 中划分到左区间的总和 划分树: 划分树是一种基于线段树的数据结构.主要用于快速求出(在log(n)的时间复杂度内)序列区间的第k大值 . 划分树和归并树都是用线段树作为辅助的,原理是基于快排 和归并排序 的. 划分树的建树过程基本就是模拟快排过程,取一个已经排过序的区间中值,然后把小于中…

解题关键:划分树模板题. #include<cstdio> #include<cstring> #include<algorithm> #include<cstdlib> #include<iostream> #include<cmath> using namespace std; typedef long long ll; ; ][MAXN],sorted[MAXN],toleft[][MAXN]; void build(int l…

题目链接 #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 node { int l,r; }tree[*N]; int sorted[N]; ][N]; ][N]; void build(in…