SPOJ Brasil

A leaf is inscribed in a square. Given the length of a side of the square. Find the area of the leaf.

A leaf is the intersection of two quarter circles drawn from two opposite ends of a square, with the radius being equal to the length of a side of the square.

Input

In the first line there will be an integer t (t ≤ 10⁵) the number of testcases. Next t lines will contain a number a (0 ≤ a ≤ 10⁶), the side length of the square.

Output

Print the area of the Leaf. Errors less than 10^-6 will be ignored.

Example

Input:
2
1
2

Output:
0.5707963268
2.2831853072