zoj 3716 Ribbon Gymnastics （思维数学题）

题目

以四个顶点为圆心画圆，圆面积不能重合，求四个圆的直径和最大是多少。

#define _CRT_SECURE_NO_WARNINGS

#include<string.h>
#include<stdio.h>
#include<math.h>
#include<algorithm>
using namespace std;

double minn(double a,double b,double c)
{

    a=a<b? a:b;
    a=a<c? a:c;
    return a;
}
int main()
{
    double x[],y[],l[];
    while(scanf("%lf%lf%lf%lf%lf%lf%lf%lf",&x[],&y[],&x[],&y[],&x[],&y[],&x[],&y[])!=EOF)
    {
        l[]=(x[]-x[])*(x[]-x[])+(y[]-y[])*(y[]-y[]);
        l[]=(x[]-x[])*(x[]-x[])+(y[]-y[])*(y[]-y[]);
        l[]=(x[]-x[])*(x[]-x[])+(y[]-y[])*(y[]-y[]);
        l[]=(x[]-x[])*(x[]-x[])+(y[]-y[])*(y[]-y[]);
        l[]=(x[]-x[])*(x[]-x[])+(y[]-y[])*(y[]-y[]);
        l[]=(x[]-x[])*(x[]-x[])+(y[]-y[])*(y[]-y[]);
        printf("%.8lf\n",minn(sqrt(l[])+sqrt(l[]),sqrt(l[])+sqrt(l[]),sqrt(l[])+sqrt(l[])));
    }
    return ;
}