Problem: The statement of this problem is the same as the statement of problem C2. The only difference is that, in problem C1, n is always even, and in C2, n is always odd.

You are given a regular polygon with 2 ⋅ n vertices (it's convex and has equal sides and equal angles) and all its sides have length 1. Let's name it as 2n-gon.

Your task is to find the square of the minimum size such that you can embed 2n-gon in the square. Embedding 2n-gon in the square means that you need to place 2n-gon in the square in such way that each point which lies inside or on a border of 2n-gon should also lie inside or on a border of the square.

You can rotate 2n-gon and/or the square.

Input

The first line contains a single integer T (1 ≤ T ≤ 200) — the number of test cases.

Next T lines contain descriptions of test cases — one per line. Each line contains single even integer n (2 ≤ n ≤ 200). Don't forget you need to embed 2n-gon, not an n-gon.

Output

Print T real numbers — one per test case. For each test case, print the minimum length of a side of the square 2n-gon can be embedded in. Your answer will be considered correct if its absolute or relative error doesn't exceed 10^{-6}.

Example

Input


3
2
4
200


Output


1.000000000
2.414213562
127.321336469

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;
 
public class Main {
    private static final boolean ONLINE_JUDGE = System.getProperty("ONLINE_JUDGE") != null;
    private static final boolean OFFLINE_WITHOUT_FILES = false;
 
    double[] sin;
    double[] cos;
 
    double Get(int n, double angle, double R, double alpha) {
        double maxx = -1e9;
        double maxy = -1e9;
        double minx = 1e9;
        double miny = 1e9;
        double s = Math.sin(angle);
        double c = Math.cos(angle);
        for (int i = 0; i < n; i++) {
            double x = (sin[i] * c + cos[i] * s) * R;
            double y = (cos[i] * c - sin[i] * s) * R;
            maxx = Math.max(x, maxx);
            minx = Math.min(x, minx);
 
            maxy = Math.max(y, maxy);
            miny = Math.min(y, miny);
        }
        return Math.max(maxx - minx, maxy - miny);
    }
 
    void Solve() throws IOException {
        int t = readInt();
        while (t-- > 0) {
            int n = readInt() * 2;
            double left = 0;
            double alpha = 2 * Math.PI / n;
            double right = alpha;
            double R = 0.5 / Math.sin(alpha / 2);
            double mid1 = 0;
            double mid2 = 0;
            sin = new double[n];
            cos = new double[n];
            for (int i = 0; i < n; i++) {
                sin[i] = Math.sin(i * alpha);
                cos[i] = Math.cos(i * alpha);
            }
            out.print(Get(n, alpha / 2, R, alpha) + "\n");
        }
    }
 
    public static void main(String[] args) {
        new Main();
    }
 
    BufferedReader in;
    PrintWriter out;
    StringTokenizer tok;
 
    Main() {
        try {
            long timeStart = System.currentTimeMillis();
            if (ONLINE_JUDGE || OFFLINE_WITHOUT_FILES) {
                in = new BufferedReader(new InputStreamReader(System.in));
                out = new PrintWriter(System.out);
            } else {
                in = new BufferedReader(new FileReader("input.txt"));
                out = new PrintWriter("output.txt");
            }
 
            tok = new StringTokenizer("");
            Solve();
            out.close();
            long timeEnd = System.currentTimeMillis();
            System.err.println("time = " + (timeEnd - timeStart) + " compiled");
        } catch (Exception e) {
            e.printStackTrace();
            System.exit(-1);
        }
    }
 
    String readLine() throws IOException {
        return in.readLine();
    }
 
    String delimiter = " ";
 
    String readString() throws IOException {
        while (!tok.hasMoreTokens()) {
            String nextLine = readLine();
            if (nextLine == null)
                return null;
            tok = new StringTokenizer(nextLine);
        }
        return tok.nextToken(delimiter);
    }
 
    int readInt() throws IOException {
        return Integer.parseInt(readString());
    }
}