N = int(input())
for i in range(N):
    A, B = map(int, input().split())

    ng = 0
    ok = 100000
    while ok - ng > 1:
        mid = (ok + ng) // 2
        if 4 * A * B < (mid ** 2 - A - B) ** 2:
            ok = mid
        else:
            ng = mid
    print(ok)