using System;
using static System.Math;
using static System.Console;
class main{
static Func<double,double> g=(x)=>Cos(5*x-1)*Exp(-x*x);
static void Main(){
	int n=6;
	var netwrk=new ann2(n);
	double a=-1,b=1;
	int nx=20;
	var xs=new double[nx];
	var ys=new double[nx];
	for(int i=0;i<nx;i++){
		xs[i]=a+(b-a)*i/(nx-1);
		ys[i]=g(xs[i]);
		Write($"{xs[i]} {ys[i]}\n");
		}
	Func<ann2,double> cost = nw => {
		double sum=0;
		for(int i=0;i<nx;i++)
			sum+=Pow(nw.func(xs[i])-ys[i],2);
		return sum/n;
	};
	Write("\n\n");
	netwrk.train(cost);
	for(double z=a;z<=b;z+=1.0/64) Write($"{z} {netwrk.func(z)}\n");
}//Main
}//main