import sys
#sys.setrecursionlimit(10 ** 6)
INF = float('inf')
MOD = 10**9 + 7
MOD2 = 998244353
from collections import defaultdict
def ceil(A,B):
    return -(-A//B)
def solve():
    def II(): return int(sys.stdin.readline())
    def LI(): return list(map(int, sys.stdin.readline().split()))
    def LC(): return list(sys.stdin.readline().rstrip())
    def IC(): return [int(c) for c in sys.stdin.readline().rstrip()]
    def MI(): return map(int, sys.stdin.readline().split())
    N = II()



    def meguru_bisect(ng, ok):
        """
        （目的値）～正の無限 が条件を満たす場合
        ng…条件を満たさない値の範囲での最大値
        ok…条件を満たす値の範囲での最小値
        ng < ok
        is_ok == Trueの場合、探索範囲が左半分へ
        is_ok == Falseの場合、探索範囲が右半分へ
        """
        while (abs(ok - ng) > 1):
            mid = (ok + ng) // 2
            if is_ok(mid):
                ok = mid
            else:
                ng = mid
        return ok
    for i in range(N):
        A,B = MI()

        def is_ok(X):
            # 条件を満たすかどうか？問題ごとに定義
            return 2*A*B < X ** 4 + A ** 2 + B ** 2 - 2  * A *(X ** 2)- 2 * B * (X ** 2)
        print(meguru_bisect(0,10**6))
    return
solve()