随笔分类 -  数学

数学技巧
摘要：1、(UVa 375)设三角形面积为S，三个边长分别为a,b,c，则内切圆半径为：2*S/(a+b+c)2、(UVa 11300) 数轴上有n个点X1,X2,…,Xn，则数轴上到这n个点距离之和最小的点是这n个点坐标的中位数。n为奇数时是中间那个点，n为偶数时是中间两个点之间任意一个点 阅读全文
posted @ 2014-02-02 19:03 ~~Snail~~ 阅读(172) 评论(0) 推荐(0)
UVa 11300 Spreading the Wealth
摘要：F. Spreading the WealthProblemA Communist regime is trying to redistribute wealth in a village. They have have decided to sit everyone around a circular table. First, everyone has converted all of their properties to coins of equal value, such that the total number of coins is divisible by the numbe 阅读全文
posted @ 2014-02-02 18:49 ~~Snail~~ 阅读(350) 评论(0) 推荐(0)