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 CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
int T, N;
double ans;
double solve(double n) {
  return -sin(3.14159265359 / n) /
         sqrt(sin(3.14159265359 / n) * sin(3.14159265359 / n) +
              cos(3.14159265359 / n) * cos(3.14159265359 / n) -
              2 * cos(3.14159265359 / n) + 1);
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.precision(9);
  cin >> T;
  while (T--) {
    cin >> N;
    N *= 2;
    double x = 1 / (sin((double)3.14159265359 / N) * 2);
    ans = 2 * x * abs(solve(N));
    cout << fixed << ans << "\n";
  }
  return 0;
}