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 PYTHON3):

Solution:
import sys
import math

for _ in range(int(input())):
    n = int(sys.stdin.readline())
    x = math.radians((180 - 360 / (2*n)) / 2)
    l = 1 / (math.cos(x))
    deg = 360 / (2*n)
    theta = math.radians(deg)

    d = 90
    m = 0
    for i in range(2*n):
        if deg*i < 90:
            d = 90 - deg*i
        else:
            m = i
            break

    lb, ub = math.radians(0), math.radians(d)
    ans = 1e9

    for _ in range(100):
        t = (ub + lb) / 2
        w, h = 0, 0
        for i in range(m):
            w = max(w, math.cos(t+i*theta)*l)
            h = max(h, math.sin(t+i*theta)*l)
        if w >= h:
            lb = t
        else:
            ub = t
        ans = min(ans, max(w, h))

    print(ans)