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.util.Locale;
import java.util.Scanner;

public class C1354 {

    public static void main(String[] args) {
        Locale.setDefault(Locale.US);
        Scanner in = new Scanner(System.in);
        int T = in.nextInt();
        for (int t=0; t<T; t++) {
            int n = in.nextInt();
            int sides = 2*n;
            double answer;
            if (n%2 == 0) {
                answer = squareSize(sides, Math.PI/sides);
            } else {
                answer = squareSize(sides, Math.PI/4);
            }
            System.out.println(answer);
        }
    }

    static double squareSize(int sides, double rotation) {
        double r = 1/(2*Math.sin(Math.PI/sides));
        double minx = Double.MAX_VALUE;
        double maxx = Double.MIN_VALUE;
        double miny = Double.MAX_VALUE;
        double maxy = Double.MIN_VALUE;
        for (int n=0; n<sides; n++) {
            double alpha = rotation + n*2*Math.PI/sides;
            double x = r*Math.cos(alpha);
            double y = r*Math.sin(alpha);
            minx = Math.min(minx, x);
            maxx = Math.max(maxx, x);
            miny = Math.min(miny, y);
            maxy = Math.max(maxy, y);
        }
        double side = Math.max(maxy-miny, maxx-minx);
        return side;
    }

}