import java.io.*;


class citeste 
{
 public static int intreg(String text)
   {
	byte b;
	byte []a= new byte[81];   
	int i=0,z;
	System.out.print(text);
	try
	{
	while((b=(byte)System.in.read())!='\n')
	{
		a[i++]=b;
	}
	}catch(IOException e) {e.printStackTrace();}
	z=Integer.parseInt(new String(a,0,(i-1)));
	return z;
   }

}

class ecgr1
{

public static void main(String args[])
{
	double a, b, x;
	a=citeste.intreg("\nIntroduceti coeficientul a=");
	b=citeste.intreg("\nIntroduceti coeficientul b=");
	try{
		System.out.println(" x=" + -b/a);
	   }catch(ArithmeticException e){System.out.println("Coeficient nul!!!");}
}
}