import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

import numpy as np

N = int(readline())
data = np.array(read().split(), np.float64)

X = data[::12]
Y = data[1::12]

answer = (np.arctan2(Y,X) / np.pi * 180) % 60
answer[answer > 50] = 0
print('\n'.join(answer.astype(str)))