def main():
    N = int(input())

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

        ng = 0
        ok = 1 << 20

        while ok - ng > 1:
            m = (ok + ng) // 2

            if m * m < A + B:
                ng = m
            else:
                if A * B < ((m * m - (A + B)) // 2) ** 2:
                    ok = m
                else:
                    ng = m

        print(ok)

    return 0


main()