A

#include "bits/stdc++.h"
using namespace std;

const int maxN = 1000;
double x[maxN];

double get (double x) {
	return 3 * x - cos(x) - 1;
}

bool check (double dx, double dy) {
	string x = to_string(dx);
	string y = to_string(dy);
	return x == y;
}

int main () {
	 ios::sync_with_stdio(false);
	 cin.tie(nullptr);
	 cout.tie(nullptr);
	 double l = 0.0, r = 10.0;
	 x[0] = 0.0;
	 for (int rep = 0; rep <= 70; ++rep) {
		 double mid = (l + r) / 2;
		 if (get(mid) >= 0.0) {
			 r = mid;
			 x[0] = mid;
		 } else {
			 l = mid;
		 }
	 }
	 //x[0] = 0.6;
	 double pi_not = (1 / 3.0) * (-sin(x[0]));
	 if (pi_not < 1) {
		 cout << pi_not << " Is less then " << 1 << '\n';
	 }
	 for (int i = 1; i <= 100; ++i) {
		 x[i] = (cos(x[i - 1]) + 1) / 3.0;
		 if (check(x[i], x[i - 1])) {
			 cout << "Iteration : " << i << ' ' << "and Value " << x[i] << '\n';
			 break;
		 }
	 }
}