2017ecjtu-summer training #5 UVA10382

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2017ecjtu-summer training #5 UVA10382

题意问最少可用几个圆覆盖矩形区域. 解析将圆形转换成矩形有效区域,直径小于等于宽度的圆不考虑,从而转化成区间覆盖问题,然后贪心出最少圆. 贪心思想每次选择出区域左界比上次选出的区域右界小的且区域最长的.更新还未覆盖的区域. AC 代码 #include<iostream> #include<stdio.h> #include<string.h> #include<cmath> #include<algorithm> #define maxn…

hdu 4946 2014 Multi-University Training Contest 8

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