N = int(input())
for i in range(N):
  a, b = map(int, input().split())
  ok = 10 ** 12
  ng = 2
  subres = -2 * a * b + a * a + b * b
  while ng + 1 < ok:
    mid = (ok + ng) // 2
    if mid ** 4 - 2 * a * mid ** 2 - 2 * b * mid ** 2 + subres > 0:
      ok = mid
    else:
      ng = mid
  print(ok)