using static System.Console;
using static System.Math;
class main{
public static void Main(){
	int n=32;
	double a=0,b=7;
	var x=new double[n];
	var y=new double[n];
	for(int i=0;i<n;i++){
		x[i]=a+i*(b-a)/(n-1);
		y[i]=Cos(x[i]);
		WriteLine($"{x[i]} {y[i]} {-Sin(x[i])} {Sin(x[i])}");
		}
	WriteLine();
	WriteLine();
	var spline=new qspline(x,y);
	for(double z=x[0];z<=x[x.Length-1];z+=1.0/32){
WriteLine($"{z} {spline.eval(z)} {spline.deriv(z)} {spline.integ(z)}");
		}
}//Main
}//main