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.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.util.*;
import java.util.concurrent.LinkedBlockingDeque;


public class scratch_25 {
    // int count=0;
    //static long count=0;
    static class Reader {
        static BufferedReader reader;
        static StringTokenizer tokenizer;

        /**
         * call this method to initialize reader for InputStream
         */
        static void init(InputStream input) {
            reader = new BufferedReader(
                    new InputStreamReader(input));
            tokenizer = new StringTokenizer("");
        }

        /**
         * get next word
         */
        static String next() throws IOException {
            while (!tokenizer.hasMoreTokens()) {
                //TODO add check for eof if necessary
                tokenizer = new StringTokenizer(
                        reader.readLine());
            }
            return tokenizer.nextToken();
        }

        static int nextInt() throws IOException {
            return Integer.parseInt(next());
        }

        static double nextDouble() throws IOException {
            return Double.parseDouble(next());
        }

        static long nextLong() throws IOException {
            return Long.parseLong(next());
        }
    }





    static class Pair implements Comparable<Pair>{
        int x;
        int y;
        public Pair(int x,int y){
            this.x=x;
            this.y=y;
        }
        @Override
        public int compareTo(Pair o){
            return this.x-o.x;


        }
        @Override
        public boolean equals(Object me) {
            Pair binMe = (Pair)me;
            if(this.x==binMe.x && this.y==binMe.y)
                return true;
            else
                return false;
        }

        @Override
        public int hashCode() {
            return this.x + this.y;
        }

        @Override
        public String toString() {
            return x+" "+y;
        }


    }





    static double pi = Math.acos(-1.0);


    static double nGon(int N)
    {

        // Projection angle variation
        // from axes
        double proAngleVar;

        // Projection angle variation
        // when the number of
        // sides are in multiple of 4
        if (N % 4 == 0)
        {
            proAngleVar = pi * (180.0 / N) / 180;
        }
        else
        {
            proAngleVar = pi * (180.0 / (2 * N)) / 180;
        }

        // Distance between the end points
        double negX = 1.0e+99,
                posX = -1.0e+99,
                negY = 1.0e+99,
                posY = -1.0e+99;

        for (int j = 0; j < N; ++j)
        {

            // Projection from all N points
            // on X-axis
            double px = Math.cos(2 * pi * j / N +
                    proAngleVar);

            // Projection from all N points
            // on Y-axis
            double py = Math.sin(2 * pi * j / N +
                    proAngleVar);

            negX = Math.min(negX, px);
            posX = Math.max(posX, px);
            negY = Math.min(negY, py);
            posY = Math.max(posY, py);
        }

        // Maximum side
        double opt2 = Math.max(posX - negX,
                posY - negY);

        // Return the portion of side
        // forming the square
        return (double)opt2 /
                Math.sin(pi / N) / 2;
    }


    public static void main(String[] args)  throws IOException {
        Reader.init(System.in);
        BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));
        int t= Reader.nextInt();

        for (int tt = 0; tt <t ; tt++) {
            int n= Reader.nextInt();
            System.out.println(nGon(2*n));





























        }
//        out.flush();
//        out.close();

    }
    public static ArrayList<Integer> Sieve(int n) {
        boolean arr[]= new boolean [n+1];
        Arrays.fill(arr,true);
        arr[0]=false;
        arr[1]=false;
        for (int i = 2; i*i <=n ; i++) {
            if(arr[i]){
                for (int j = 2; j <=n/i ; j++) {
                    int u= i*j;
                    arr[u]=false;
                }}
        }
        ArrayList<Integer> ans= new ArrayList<>();
        for (int i = 0; i <n+1 ; i++) {
            if(arr[i]){
                ans.add(i);
            }
        }
        return ans;
    }




    static long power( long x, long y, long p)
    {

        long res = 1;


        x = x % p;

        if (x == 0) return 0;

        while (y > 0)
        {

            if((y & 1)==1)
                res = (res * x) % p;


            y = y >> 1;
            x = (x * x) % p;
        }
        return res;
    }

    public static long ceil_div(long a, long b){
        return (a+b-1)/b;
    }

    static long gcd(long a, long b)
    {
        if (a == 0)
            return b;
        return gcd(b % a, a);
    }

    static long lcm(long a, long b)
    {
        return (a*b)/gcd(a, b);
    }

}