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 PYTHON):

Solution:
from fractions import gcd
from math import factorial, ceil, sqrt, atan2, log, pi, e, asin,acos, cos, sin, floor, atan
from itertools import *
from fractions import Fraction
import string
import copy
import random
import bisect
from decimal import *
from collections import deque
from sys import *

def mp():
	return map(int, str(raw_input()).split())

t=input()
for i in range(t):
	n=input()
	
	a = 0
	b = 0

	x = 1.0/n
	x = x*pi
	y = x
	# print y

	for j in range(n/2):
		# print (x*(j+1))
		a = a + sin(y)
		b = b + cos(y)
		y += x

	a = a*2
	b = b*2
	b = b+1

	# print a, b
	interior = (2*n-2)*180.0
	interior = interior/(n*2)
	interior = interior/2.0
	interior = (interior*pi)/180.0

	# print interior
	x = sin(interior)
	y = cos(interior)
	# print x, y
	t = atan2((1-x), y)

	b = b*cos(t)

	print b