OJ-Problems-Source/HDOJ/3011_autoAC.cpp

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#include<stdio.h>
#include<math.h>
int main()
{
double r,a,b,c,t;
double x1,x2;
while(scanf("%lf%lf",&r,&a)!=EOF)
{
t=-1.0;
b=r-a;
c=r*r*r/a/2-2*r*r+a*r;
if(b*b-4*c<0)
{
printf("Oh, my god!\n");
continue;
}
x1=(-b+sqrt(b*b-4*c))/2;
x2=(-b-sqrt(b*b-4*c))/2;
if(x1>=0&&x1<=r)
t=x1;
else if(x2>=0&&x2<=r)
t=x2;
if(t>=0&&t<=r)
printf("%.2lf\n",t);
else
printf("Oh, my god!\n");
}
return 0;
}