package Program;
import java.util.*;
public class Vich_Math_2lab {
    
    public static void main(String[] args) {
        double e = 1e-6;
        int N = 1;
        double A, B, I1=0, I2=0, Runge;
        System.out.println("Input A and B");
        Scanner SC = new Scanner(System.in);
        A = SC.nextDouble();
        B = SC.nextDouble();
        
        do
        {
            double h;
            h = (B-A)/(N);
            for(long i=0;i<N;i++)
            {
                I1+=h/6*(F(A+i*h)+F(A+i*h+h)+4*F(A+i*h+h/2));
                I2+=h/12*(F(A+i*h)+F(A+i*h+h)+4*F(A+i*h+h/2));
            }
            h/=2;
            N*=2;
            Runge = Math.abs((I1-I2)/15);
        }
        while(Runge>e);
        System.out.println("E = " + e);
        System.out.println("Runge = " + Runge);
        System.out.println("N = " + N);
        System.out.println("I = " + I2);
        }
    public static double F(double x)
    {
        double degree = x*Math.PI/180;
        double result;
        result = (Math.cos(degree) + Math.pow(x, 2)); // + 3*x*Math.sqrt(x));
        return result;
    }
}