#include "stdio.h"
#include "math.h"
void main()
{
    double a,b,c,d,x1,x2;
    scanf("%lf%lf%lf",&a,&b,&c);
    d=b*b-4*a*c;
    if(d=0)
    {
        printf("%f\n",-b/(2*a));
    }
    else
    {
        if(d>0)
        {
            printf("%f",(-b+sqrt(d))/(2*a));
            printf("%f",(-b-sqrt(d))/(2*a));
        }
    }
    else
    {
        printf("无解！"）；
    }