#include "pch.h"
#include <iostream>
#include <locale>
#include <math.h>
using namespace std;
float f(float x)
{
	return (1 / sqrt(3+pow(x,2)));
}
float f2(float x, float y)
{
	return abs( (2 * pow(x, 2) - 3) /( pow(pow((pow(y, 2) + 3),5),0.5)));
}
int main()
{int i, n; float G,h,I,S=0; float t[4]; float M; float a = 0.4, b=1.2;

	setlocale(LC_ALL, "rus");

	t[0] = f2(a, a);
	t[1] = f2(a, b);
	t[2] = f2(b, a);
	t[3] = f2(b, b);
	M = t[1];
	for (i = 0; i < 4; i++)
	  {
	  if (M < t[i]) M = t[i];
	  };
  M = ceil(M);
  G = sqrt((pow((b-a),3)*M)/0.006);
  cout << "Введите n > " << round(G) << endl;
  cin >> n;
  cout << endl;
  float *x = new float[n+1];
  float *y = new float[n+1];
  h = (b - a) / n;
    for (i=0;i<n+1;i++)
      {
	  x[i] = a + i * h;
      };
	for (i = 0; i < n+1; i++)
	{
		y[i] = f(x[i]);
	};
	for (i = 1; i < n; i++)
	{
		S = S + y[i];
	};
	I = h * (((y[0]+y[n]) / 2) + S);
	cout << I << endl;
}