geometry sucks

// #include "pch.h"

#include <iostream>
#include <fstream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <stack>
#include <queue>
#include <map>
#include <set>
#include <deque>


using namespace::std;
int INF = 1e9 + 100;
long double pi = 3.141592653589;


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cout.setf(ios::fixed);
    cout.precision(10);


    long double R, n;
    cin >> n >> R;

    long double a = 2 * R * tan(pi / n);
    long double r = a / (2 * sin(pi / n));

    long double alpha = (360.0 / n) * (pi / 180.0), pi2 = 2 * pi;
    for (int i = 0; i < n; i++) {
        cout << r * cos(alpha + (pi2 * i) / n) << " " << r * sin(alpha + (pi2 * i) / n) << "\n";
    }


    return 0;
}