@[bye_wjx](/user/575994) 你会 del(0)，得到 cnt[0] = -1。
by FGgirl @ 2023-01-02 20:54:54
@[FGgirl](/user/712974) 草，thx
by Etinorally @ 2023-01-02 20:55:16
空区间初始化应该写 `l = 1, r = 0` 的。
by FGgirl @ 2023-01-02 20:55:31