Minimum Value Rectangle time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You have nn sticks of the given lengths. Your task is to choose exactly four of them in such a way that they can for…

https://www.luogu.org/problemnew/show/CF1027C #include<cstdio> #include<string> #include<cstdlib> #include<cmath> #include<iostream> #include<cstring> #include<set> #include<queue> #include<algorithm>…

之前做的时候没想出来...现在来数学推导一波. 题意:从n个木棒中选出4个拼成一个矩形,使得 (周长)2/面积 最小. 解:设矩形宽a长b.我们要最小化下面这个式子: 去掉常数,不妨设b = a + len,则化为下式: 取倒数,也就是最大化下式: 显然对于每个确定的a,len越小越好.所以直接取相邻的即可. 好像还有一种推导方法...... 原式可直接化为a/b + b/a,这就是个耐克函数双钩函数,让a/b趋近1也就是a=b,所以a和b越接近越好.…

Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from these points, with sides not necessarily parallel to the x and y axes. If there isn't any rectangle, return 0. Example 1: Input: [[1,2],[2,1],[1,0],[0,1]]…

题目传送门 /* 贪心/数学:还以为是BFS,其实x1 + 4 * k = x2, y1 + 4 * l = y2 */ #include <cstdio> #include <algorithm> #include <cstring> using namespace std; ; const int INF = 0x3f3f3f3f; char s[MAXN][MAXN]; int main(void) //Codeforces Round #212 (Div. 2)…

Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from these points, with sides not necessarily parallel to the x and y axes. If there isn't any rectangle, return 0. Example 1: Input: [[1,2],[2,1],[1,0],[0,1]]…

题目如下: Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from these points, with sides not necessarily parallel to the x and y axes. If there isn't any rectangle, return 0. Example 1: Input: [[1,2],[2,1],[1,0],[…

Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from these points, with sides not necessarily parallel to the x and y axes. If there isn't any rectangle, return 0. Example 1: Input: [[1,2],[2,1],[1,0],[0,1]]…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 线段长+线段中心+字典 日期 题目地址:https://leetcode.com/problems/minimum-area-rectangle-ii/ 题目描述 Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from…

题意:给定n根木棍,不允许拼接或折断,选择四根组成矩形,求所有合法矩形中周长平方与面积比最小的一个,输出拼成这个矩形的四根木棍 n<=1e6 思路:猜结论:答案必定从相邻的4根中产生 证明见https://www.luogu.org/blog/78371/so1ution-cf1027c #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<ios…