41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#include<stdio.h>
|
|
#include<math.h>
|
|
#include<algorithm>
|
|
using namespace std;
|
|
#define EPS 1e-8
|
|
int main(){
|
|
int t,i,ca=1;
|
|
scanf("%d",&t);
|
|
double ti,g=10;
|
|
double x0[3],vx[3],vy[3],d[3],v[3];
|
|
double a,b,t1,c;
|
|
while(t--){
|
|
for(i=0;i<3;i++)scanf("%lf",x0+i);
|
|
for(i=0;i<3;i++)scanf("%lf",v+i);
|
|
for(i=0;i<3;i++)scanf("%lf",d+i);
|
|
for(i=0;i<3;i++){
|
|
vx[i]=v[i]*cos(d[i]);
|
|
vy[i]=v[i]*sin(d[i]);
|
|
if(i==0 || ti>2*vy[i]/g)
|
|
ti=2*vy[i]/g;
|
|
}
|
|
a=(vx[0]-vx[1])*(vy[1]-vy[2])-((vx[1]-vx[2])*(vy[0]-vy[1]));
|
|
b=(x0[0]-x0[1])*(vy[1]-vy[2])-(x0[1]-x0[2])*(vy[0]-vy[1]);
|
|
printf("Case #%d: ",ca++);
|
|
if(ti<EPS)
|
|
printf("-1\n");
|
|
else if(fabs(a)<EPS && fabs(b)<EPS)
|
|
printf("Multiply answer\n");
|
|
else if(fabs(a)<EPS)
|
|
printf("-1\n");
|
|
else{
|
|
t1=-b/a;
|
|
if(t1>EPS && ti-t1>-EPS )
|
|
printf("%.4lf\n",t1+EPS);
|
|
else
|
|
printf("-1\n");
|
|
}
|
|
}
|
|
return 0;
|
|
}
|