hdu 1221 Rectangle and Circle

//0MS    240K    1273 B    C++    
//简单数学题，计算圆形和矩形是否有交点
//我是利用圆形 圆心式 判断 
#include<stdio.h>
#include<math.h>
int main(void)
{
    int t;
    double x,y,r,x1,y1,x2,y2;
    scanf("%d",&t);
    while(t--)
    {
        scanf("%lf%lf%lf%lf%lf%lf%lf",&x,&y,&r,&x1,&y1,&x2,&y2);
        if(x1>x2){
            double t1=x1;x1=x2;x2=t1;
            double t2=y1;y1=y2;y2=t2;
        }
        int flag=0;
        if(r*r>=(x1-x)*(x1-x)){
            double temp=sqrt(r*r-(x1-x)*(x1-x))+y;
            if(temp>=y1 && temp<=y2) flag=1;
            temp=-temp;
            if(temp>=y1 && temp<=y2) flag=1;
        }
        if(r*r>=(x2-x)*(x2-x)){
            double temp=sqrt(r*r-(x2-x)*(x2-x))+y;
            if(temp>=y1 && temp<=y2) flag=1;
            temp=-temp;
            if(temp>=y1 && temp<=y2) flag=1;
        }
        if(r*r>=(y1-y)*(y1-y)){
            double temp=sqrt(r*r-(y1-y)*(y1-y))+x;
            if(temp>=x1 && temp<=x2) flag=1;
            temp=-temp;
            if(temp>=x1 && temp<=x2) flag=1;
        }
        if(r*r>=(y2-y)*(y2-y)){
            double temp=sqrt(r*r-(y2-y)*(y2-y))+x;
            if(temp>=x1 && temp<=x2) flag=1;
            temp=-temp;
            if(temp>=x1 && temp<=x2) flag=1;
        }
        if(flag) puts("YES");
        else puts("NO");
    }
    return 0;
}