# include <iostream.h>
# include <stdio.h>
# include <string.h>
# include <assert.h>
# include <ctype.h>
# include <math.h>
# include <stdlib.h>




double readdata(FILE* in,double &f)
{
	double r,ro,h,ho,to,so,t,s,v=0,vi,time=-1;
	int d,I;
	fscanf(in,"%d",&d);
	fscanf(in,"%d",&I);
	fscanf(in,"%lf",&f);
	if (f==0) return 0;
	fscanf(in,"%lf %lf",&ho,&ro);
	for (int i=2;i<=d;i++)
	{
		fscanf(in,"%lf %lf",&h,&r);
		if (h<f)
		{
			v=v+((h-ho)*(r*r+ro*ro+r*ro)*3.14159265358979)/(double)3;
		}
		else if((h>=f)&&(ho<f))
		{
			double rt=ro+(f-ho)*(r-ro)/(h-ho);
			v=v+((f-ho)*(rt*rt+ro*ro+rt*ro)*3.14159265358979)/(double)3;
		}
		ho=h;ro=r;
	}
	fscanf(in,"%lf %lf",&to,&so);
	for (i=2;i<=I;i++)
	{
		fscanf(in,"%lf %lf",&t,&s);
		vi=(t-to)*(3.14159265358979*r*r)*so;
		if (v>vi) v-=vi;
		else if (v>0) 
		{
			time=v/((3.14159265358979*r*r)*so)+to;
			v=0;
		}
		so=s;to=t;
	}
	if((v>0)&&(so>0))
	{
		time=v/((3.14159265358979*r*r)*so)+to;
		v=0;
	}

	return time;
}


void main()
{
	int nrruns;
	double time,f;

	FILE* in=fopen("vase.in","rt");
	FILE* out=fopen("vase.out","wt");
    fscanf(in,"%d",&nrruns);
	for (int i=1;i<=nrruns;i++)
	{
		time=readdata(in,f);
		if (time==-1) fprintf (out,"Data Set %d: Vase is never filled to height %.2f\n",i,f);
		else fprintf (out,"Data Set %d: Vase is filled to height %.2f at time %.2f\n",i,f,time);
	}
}