box-n-ball
Source: hackerearth
Difficulty: UNKNOWN_DIFFICULTY

Bozo is shifting his house. He has some balls and boxes which he has to shift. He now wonders how large a ball he can fit in a given box. Given the dimensions of a box, help Bozo determine the radius of the largest ball that he can fit in the box. Assume that an inflated ball will be spherical.

Input:-

The first line of the input will be T, the number of test cases. Next follows T lines each containing three space separated integers (L, B, H) which are the length, breadth and height of the box respectively.

Output:-

Print T lines each consisting of the radius(correct to 1 decimal place) of the largest ball that Bozo can fit in the box of dimensions corresponding to each test case.

Constraints:

1 ≤ T ≤ 10^5 
1 ≤ L, B, H ≤ 10^18

SAMPLE INPUT
3
1 2 3
3 3 7
987548 4578445 9645875456

SAMPLE OUTPUT
0.5
1.5
493774.0


for _ in range(int(input())):
	a = list(map(int, input().split()))
	print("%.1f"%(min(a) / 2.))