#include <stdio.h>
#include <math.h>

int main(void) {

	double x, x1 = 0.0, x2 = 1.0, e = 0.000001, xvstep, sum = 0.0, hop;

	while (x2 - x1 > e)
	{
		x = x1 + (x2 - x1) / 2;
		if ((atan(x1) - 5.0 / 7) * (atan(x) - 5.0 / 7) < 0)
			x2 = x;
		else x1 = x;
	}

	printf("%.7f\n%.8f\n", x, x2 - x1);
	int n = 1;
	xvstep = x;
	sum += x;
	e = 0.00001;
	//hop = sum - 0.4;

	/*while (hop > e)*/

	//while (sum % -> e)

	while ((int)(sum * 10000.0) % 10 > 0)
	{
		xvstep = (xvstep * x * x) / (2 * n + 1);

		sum = sum + n % 2 == 0 ? +xvstep : -xvstep;

		n++;
		//hop = sum - 0.4;
		//if (hop < 0)
		//	hop = hop * (-1);
	}
	printf("%.6f\n%d\n", sum, n - 1);
	return 0;
}