#include<stdio.h>
#include<math.h>

double
x0,q0,x1,q1,x2,q2,a,b,c,a0,b0,c0,a1,b1,c1,cx,cq,r,minx,maxx,minq,maxq;

double roundup(double num)
{
  if((long)(num)==num)return num;
  else if(num>0)return(long)(num+1);else return(long)(num);
}

double rounddown(double num)
{
  if((long)(num)==num)return num;
  else if(num>0)return(long)(num);else return(long)(num-1);
}

int main()
{
  scanf("%lf%lf%lf%lf%lf%lf",&x0,&q0,&x1,&q1,&x2,&q2);
  minx=x0;if(minx>x1)minx=x1;
  maxx=x0;if(maxx<x1)maxx=x1;
  minq=q0;if(minq>q1)minq=q1;
  maxq=q0;if(maxq<q1)maxq=q1;
  cx=(x0+x1)/2;cq=(q0+q1)/2;
  a=q1-q0;b=x0-x1;c=x1*q0-x0*q1;
  if(a!=0){a0=b/a;b0=-1;c0=cq-a0*cx;}
    else{a0=1;b0=0;c0=-cx;}
  cx=(x0+x2)/2;cq=(q0+q2)/2;
  a=q2-q0;b=x0-x2;c=x2*q0-x0*q2;
  if(a!=0){a1=b/a;b1=-1;c1=cq-a1*cx;}
    else{a1=1;b1=0;c1=-cx;}
  cx=(b0*c1-b1*c0)/(a0*b1-a1*b0);cq=(a1*c0-a0*c1)/(a0*b1-a1*b0);
  r=sqrt((x0-cx)*(x0-cx)+(q0-cq)*(q0-cq));
  a=q1-q0;b=x0-x1;c=x1*q0-x0*q1;
  if((a*x2+b*q2+c)*(a*(cx-r)+b*cq+c)>=0)minx=cx-r;
  if((a*x2+b*q2+c)*(a*(cx+r)+b*cq+c)>=0)maxx=cx+r;
  if((a*x2+b*q2+c)*(a*cx+b*(cq-r)+c)>=0)minq=cq-r;
  if((a*x2+b*q2+c)*(a*cx+b*(cq+r)+c)>=0)maxq=cq+r;
  minx=roundup(minx);
  maxx=rounddown(maxx);
  minq=roundup(minq);
  maxq=rounddown(maxq);
  if(minx<-1000)minx=-1000;if(minq<-1000)minq=-1000;
  if(maxx>1000)maxx=1000;if(maxq>1000)maxq=1000;
  printf("%0.0lf",fabs((maxx-minx)*(maxq-minq)));
  return 0;
}

> #include<stdio.h>
> #include<math.h>
>
> double
>
x0,q0,x1,q1,x2,q2,a,b,c,a0,b0,c0,a1,b1,c1,cx,cq,r,minx,maxx,minq,maxq;
>
> double roundup(double num)
> {
>   if((long)(num)==num)return num;
>   else if(num>0)return(long)(num+1);else return(long)(num);
> }
>
> double rounddown(double num)
> {
>   if((long)(num)==num)return num;
>   else if(num>0)return(long)(num);else return(long)(num-1);
> }
>
> int main()
> {
>   scanf("%lf%lf%lf%lf%lf%lf",&x0,&q0,&x1,&q1,&x2,&q2);
>   minx=x0;if(minx>x1)minx=x1;
>   maxx=x0;if(maxx<x1)maxx=x1;
>   minq=q0;if(minq>q1)minq=q1;
>   maxq=q0;if(maxq<q1)maxq=q1;
>   cx=(x0+x1)/2;cq=(q0+q1)/2;
>   a=q1-q0;b=x0-x1;c=x1*q0-x0*q1;
>   if(a!=0){a0=b/a;b0=-1;c0=cq-a0*cx;}
>     else{a0=1;b0=0;c0=-cx;}
>   cx=(x0+x2)/2;cq=(q0+q2)/2;
>   a=q2-q0;b=x0-x2;c=x2*q0-x0*q2;
>   if(a!=0){a1=b/a;b1=-1;c1=cq-a1*cx;}
>     else{a1=1;b1=0;c1=-cx;}
>   cx=(b0*c1-b1*c0)/(a0*b1-a1*b0);cq=(a1*c0-a0*c1)/(a0*b1-a1*b0);
>   r=sqrt((x0-cx)*(x0-cx)+(q0-cq)*(q0-cq));
>   a=q1-q0;b=x0-x1;c=x1*q0-x0*q1;
>   if((a*x2+b*q2+c)*(a*(cx-r)+b*cq+c)>=0)minx=cx-r;
>   if((a*x2+b*q2+c)*(a*(cx+r)+b*cq+c)>=0)maxx=cx+r;
>   if((a*x2+b*q2+c)*(a*cx+b*(cq-r)+c)>=0)minq=cq-r;
>   if((a*x2+b*q2+c)*(a*cx+b*(cq+r)+c)>=0)maxq=cq+r;
>   minx=roundup(minx);
>   maxx=rounddown(maxx);
>   minq=roundup(minq);
>   maxq=rounddown(maxq);
>   if(minx<-1000)minx=-1000;if(minq<-1000)minq=-1000;
>   if(maxx>1000)maxx=1000;if(maxq>1000)maxq=1000;
>   printf("%0.0lf",fabs((maxx-minx)*(maxq-minq)));
>   return 0;
> }

??

you still wa !!

Yes
You are still
WA!!!!!!?!!!!!!!