local ior = io.input()
local t = ior:read("*n", "*l")
for i = 1, t do
  ior:read("*l")
  local x, y = ior:read("*n", "*n", "*l")
  for j = 1, 5 do ior:read("*l") end
  local z = math.atan2(y, x) / math.pi * 180 + 360
  while(55 < z) do
    z = z - 60
  end
  print(string.format("%.8f", z))
end