public class RandomNumber{
    public static void main(String []args){
        java.util.Scanner in = new java.util.Scanner(System.in);
        System.out.print("Input value of X\t: ");
        double X=in.nextDouble();
        System.out.print("How many iteration\t: ");
        int n=in.nextInt();
        System.out.println();
        System.out.println("\trand1(X)\trand2(X)\trand3(X)\trand1(X,Y)");
        System.out.println("\t========\t========\t========\t==========");
        for(int i=0;i<n;i++){
            System.out.print("\t");
            System.out.printf("%.4f",randomNegToPos1(X));
            System.out.print("\t\t");
            System.out.printf("%.4f",randomNegToPos2(X));
            System.out.print("\t\t");
            System.out.printf("%.4f",randomNegToPos3(X));
            System.out.print("\t\t");
            System.out.printf("%.4f",randomNumBetween1(-X,X));
            System.out.println();
        }
        System.out.println("\t========\t========\t========\t==========");
        System.out.println("\trand1(X)\trand2(X)\trand3(X)\trand1(X,Y)");

        System.exit(0);
    }

    public static double randomNegToPos1(double x){
        double rand=Math.random()*x;
        if(Math.random()<0.5){
            rand*=-1;
        }
        return rand;
    }

    public static double randomNegToPos2(double x){
        return (Math.random()*2-1)*x;
    }

    public static double randomNegToPos3(double x){
        return (Math.random()-Math.random())*x;
    }

    public static double randomNumBetween1(double x, double y){
        return Math.random()*(y-x)+x;
    }
}