#include <iostream>
using namespace std;

void Sim(int inp)
{
	float s2, eps, n;
	n = inp;
	s2 = 0;
	eps = 0.0001;
	int mark = 1, k = 0;
	float s1, x, b, a;
	b = 8.0;
	a = 1.0;
	do
	{
		s1 = s2;
		s2 = 0;
		for (int i = 2; i < n - 1; i++)
		{
			x = i*(b - a) / n;
			if (mark == 1)
			{
				mark = 0;
				s2 += 4 * (x + x);
			}
			else
			{
				mark = 1;
				s2 += 2 * (x + x);
			}
			k++;
		}
		s2 += a + a + b + b;
		s2 *= b / (3 * n);
		n *= 2;
	} while (abs(s2 - s1) > eps);
	cout << "Симпсон: " << s2 << endl;
	cout << "Колиество итераций: " << k << endl;
}

void Rect(int inp)
{
	int k = 0;
	float s1, s2, eps, b, a, h, x, n;
	n = inp;
	s2 = 0;
	s1 = s2;
	eps = 0.0001;
	b = 8.0;
	a = 1.0;
	do {
		h = (b - a) / n;
		for (int i = 1; i < n; i++)
		{
			x = a + h*i - h / 2.0;
			s2 += x + x;
			k++;
		}
		s2 *= h;
		n *= 2;
		cout << "s2: " << s2 << " s1: " << s1 << " abs(s2 - s1): " << abs(s2 - s1) << " eps: " << eps << endl;
	} while (abs(s2 - s1) > eps);
	cout << "Метод треугольников: " << s2 << endl;
	cout << "Колиество итераций: " << k << endl;
}

int main()
{
	int n;
	setlocale(LC_ALL, "RUS");
	cin >> n;
	Sim(n);
	Rect(n);
	system("pause");
	return 0;
}