import sys
input = sys.stdin.readline

N = int(input())
for _ in range(N):
  A, B = map(int, input().split())
  ok, ng = 100000, 0
  while ok - ng > 1:
    mid = (ok + ng) // 2
    if mid * mid - A - B >= 0 and 4 * A * B < (mid * mid - A - B) ** 2:
      ok = mid
    else:
      ng = mid
  assert 4 * A * B < (ok * ok - A - B) ** 2
  print(ok)