/*poj3348Cows凸包+多边形面积水题floor向下取整，返回的是double*/#include<stdio.h>#include<math.h>#include<algorithm>usingnamespacestd;constdoubleeps=1e-8;structp...

　　求凸包面积（答案÷50）　　凸包裸题。#include<cstring>#include<cstdio>#include<algorithm>#include<cstdlib>#include<cmath>usingnamespacestd;...