19 lines
472 B
C++
19 lines
472 B
C++
#include<cstdio>
|
|
#include<cmath>
|
|
int main()
|
|
{
|
|
double a,b,c,d;
|
|
double as,bs,t,si;
|
|
double x1,x2,x3;
|
|
scanf("%lf%lf%lf%lf",&a,&b,&c,&d);
|
|
as=b*b-3*a*c;
|
|
bs=b*c-9*a*d;
|
|
t=(2*as*b-3*a*bs)/(2*sqrt(as*as*as));
|
|
si=acos(t);
|
|
x1=(-b-2*sqrt(as)*cos(si/3))/(3*a);
|
|
x2=(-b+sqrt(as)*(cos(si/3)+sqrt(3)*sin(si/3)))/(3*a);
|
|
x3=(-b+sqrt(as)*(cos(si/3)-sqrt(3)*sin(si/3)))/(3*a);
|
|
printf("%.2lf %.2lf %.2lf\n",x1,x3,x2);
|
|
return 0;
|
|
}
|