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#include "stdafx.h"
#include <iomanip>
#include <fstream>
#include <Windows.h>
#include <iostream>
#include <vector>
#include <math.h>
#include <map>

using namespace std;
//change variant: 16/18
const int variant = 16;
const double eps0 = 1e-4, eps1 = 1e-5, eps = 1e-7;
ofstream f_o("out.txt");


double Ax(double x)
{
	switch (variant)
	{
	case 16:
		return 30 * (-x + 0.5);
		break;
	case 18:
		return 50 * (x + 1);
		break;
	}
}

double Bx(double x)
{
	switch (variant)
	{
	case 16:
		return pow(x, 2)+1;
		break;
	case 18:
		return -pow(x, 2) + 2;
		break;
	}
}

double Cx(double x)
{
	switch (variant)
	{
	case 16:
		return x + 2;
		break;
	case 18:
		return 2*x + 1;
		break;
	}
}

double Ypr2(double x) {
	return -60. * x* log(variant + 1.)*(5. * x*x*x - 10. * x*x + 6. * x - 1.);
}

double Ypr1(double x) {
	return 1. - 30. * log(variant + 1.)*(x - 1.)*(x - 1.)*x*x*(2. * x - 1.);
}

double Ypr(double x)
{
	return 1. + x + 10. * log(variant + 1.) * pow (x, 3) * pow((1. - x), 3);
}

double F(double x) {
	return Ypr2(x) + Ax(x)*Ypr1(x) - Bx(x)*Ypr(x) + Cx(x)*sin(Ypr(x));
}