OJ-Problems-Source/HDOJ/3940_autoAC.cpp
2016-09-04 14:19:03 +08:00

53 lines
1.3 KiB
C++

#include <iostream>
#include <cstring>
#include <cmath>
using namespace std;
double fly_pos(double vx,double vy,double h)
{
return vx*(vy+sqrt(vy*vy+19.6*h))/9.8;
}
double fly_h(double vy,double h,double t)
{
return h+vy*t-4.9*t*t;
}
int main()
{
double h,vx,vy,t,h0,l,v1,v2,v3;
char bird[10];
while(~scanf("%lf%s",&h,bird))
{
if(!strcmp("Red",bird))
{
scanf("%lf%lf",&vx,&vy);
printf("%.3lf\n",fly_pos(vx,vy,h));
}
else if(!strcmp("Blue",bird))
{
scanf("%lf%lf%lf%lf%lf%lf",&vx,&vy,&t,&v1,&v2,&v3);
if(fly_pos(vx,vy,h)<t*vx)
{
printf("%.3lf\n",fly_pos(vx,vy,h));
continue;
}
h0=fly_h(vy,h,t);
l=vx*t;
vy=vy-9.8*t;
printf("%.3lf %.3lf %.3lf\n",l+fly_pos(v1,vy,h0),l+fly_pos(v2,vy,h0),l+fly_pos(v3,vy,h0));
}
else
{
scanf("%lf%lf%lf",&vx,&vy,&t);
if(fly_pos(vx,vy,h)<t*vx)
{
printf("%.3lf\n",fly_pos(vx,vy,h));
continue;
}
h0=fly_h(vy,h,t);
l=vx*t;
vy=vy-9.8*t;
printf("%.3lf\n",l+fly_pos(2*vx,2*vy,h0));
}
}
return 0;
}