持续的含义是啥

P1567 统计天数

@[stdman2021](/user/593976) 算1的,朋友
by ben090302 @ 2022-03-19 15:42:14


@[ben090302](/user/609092) okok,谢谢啦
by stdman2021 @ 2022-03-19 21:51:17


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