public class Parabola {
    //Finds parabola min/max
    public static void main(String args[]){
        int a = 29;
        int b = -31;
        int c = 99;

        float x = findX(a,b);
        float y = findY(a,b,c,x);

        if (a < 0){
            System.out.println("max: x="+ x + " y=" + y);
        }
        else{
            System.out.println("min: x="+ x + " y=" + y);
        }
    }

    public static float findX(float a, float b){
        if (a == 0){
            return -1;
        }
        else{
            return (-b)/(2*a);
        }
    }
    public static float findY(float a, float b, float c, float x){
        return a*(x*x) + (b*x) + c;
    }
}