1.因为连续出现三个ID减一

2.as可以省略

# Write your MySQL query statement below
SELECT DISTINCT
    l1.Num AS ConsecutiveNums
FROM
    Logs as l1,
    Logs as l2,
    Logs as l3
WHERE
    l1.Id = l2.Id - 1
    AND l2.Id = l3.Id - 1
    AND l1.Num = l2.Num
    AND l2.Num = l3.Num