描述 There are several ancient Greek texts that contain descriptions of the fabled island Atlantis. Some of these texts even include maps of parts of the island. But unfortunately, these maps describe different regions of Atlantis. Your friend Bill ha…

题意:给出矩形两对角点坐标,求矩形面积并. 解法:线段树+离散化. 每加入一个矩形,将两个y值加入yy数组以待离散化,将左边界cover值置为1,右边界置为2,离散后建立的线段树其实是以y值建的树,线段树维护两个值:cover和len,cover表示该线段区间目前被覆盖的线段数目,len表示当前已覆盖的线段长度(化为离散前的真值),每次加入一条线段,将其y_low,y_high之间的区间染上line[i].cover,再以tree[1].len乘以接下来的线段的x坐标减去当前x坐标,即计算了一部…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1542 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Problem Description There are several ancient Greek texts that contain descriptions of the fabled island Atlantis. So…

Atlantis Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6116    Accepted Submission(s): 2677 Problem Description There are several ancient Greek texts that contain descriptions of the fabled i…

大意: 求矩形面积并. 枚举$x$坐标, 线段树维护$[y_1,y_2]$内的边是否被覆盖, 线段树维护边时需要将每条边挂在左端点上. #include <iostream> #include <algorithm> #include <cstdio> #include <math.h> #include <set> #include <map> #include <queue> #include <string&g…

Atlantis Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 8998    Accepted Submission(s): 3856 Problem Description There are several ancient Greek texts that contain descriptions of the fabled i…

HDU 1542 Atlantis 题目链接 题意:给定一些矩形,求面积并 思路:利用扫描线,因为这题矩形个数不多,直接暴力扫就能够了.假设数据大.就要用线段树 代码: #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> using namespace std; const int N = 205; const int M = 100005; const dou…

Atlantis Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6386    Accepted Submission(s): 2814 Problem Description There are several ancient Greek texts that contain descriptions of the fabled i…

将 x 轴上的点进行离散化,扫描线沿着 y 轴向上扫描 每次添加一条边不断找到当前状态有效边的长度 , 根据这个长度和下一条边形成的高度差得到一块合法的矩形的面积 #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; +; ];//记录某个区间的下底边个数 ];//记录某个区间的下底边总长度 double x[MAX];//…

There are several ancient Greek texts that contain descriptions of the fabled island Atlantis. Some of these texts even include maps of parts of the island. But unfortunately, these maps describe different regions of Atlantis. Your friend Bill has to…