n = int(input())
for i in range(n):
  a, b = map(int, input().split())
  ok, ng = 65000, 0
  while ok - ng > 1:
    mid = (ok + ng) // 2
    if 4 * a * b < (mid ** 2 - a - b) * (mid ** 2 - a - b) and (mid ** 2 - a - b) > 0:
      ok = mid
    else:
      ng = mid
  print(ok)