题目大意: 有n个矩形在地上排成一列,不可重叠,已知他们的宽度w和高度h,现在使至多[n / 2]个矩形旋转90度,问最后可以用多小的矩形恰好覆盖这n个矩形,求满足条件的最小矩形面积. n, w, h <= 1000. 分析: 数据范围比较小,可以枚举答案矩形的高度H,判断是否能只旋转至多[n / 2]个矩形使得n个矩形的高度均不超过H,再用剩下的操作次数尽量使得总宽度变少. 贪心旋转,尽量把w比h大很多的矩形旋转,所以可以对矩形按照{w - h}排序,贪心旋转即可. #include<cst…

贪心枚举最后方案中最大的h,设为maxh若某个人i的wi与hi均大于maxh,则此方案不可行若某个人恰有一个属性大于maxh,则可确定他是否换属性剩下的人按wi-hi从大到小排序后贪心选择O(nlogn+n2) #include<iostream> #include<cstdio> #include<vector> #include<algorithm> using namespace std; ; int n,w[maxn],h[maxn],hh,ans=…

传送门 解题思路 这道题要用到贪心的思路,首先要枚举一个h的最大值,之后check.如果这个东西的w[i]与h[i]都大于枚举的值就直接return false,如果w[i]比这个值小,h[i]比这个值大,就将h[i]与w[i]交换,注意并不能直接交换因为后面还要用到,要在答案中将h[i]加上.如果交换次数比n/2大也return false,如果w[i]与h[i]均比这个值小,则将w[i]-h[i]加入数组.后面将它排序,选出可以被交换的更新答案. 代码 #include<iostream>…

Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra people (if any) standing in…

Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra people (if any) standing in…

Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra people (if any) standing in…

1109 Group Photo (25 分) Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra peop…

1109 Group Photo(25 分) Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra peopl…

Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra people (if any) standing in…

Formation is very important when taking a group photo. Given the rules of forming K rows with N people as the following: The number of people in each row must be N/K (round down to the nearest integer), with all the extra people (if any) standing in…