萌新求助

P2717 寒假作业

@[_yjh](/user/222104) + 此题要开 `long long`; + `cin`巨慢,建议换成`scanf`。
by Nuclear_Pasta @ 2023-05-13 20:43:48


@[departure2020](/user/609565) thx,但是我去年已经把这题补掉了/bx
by _yjh @ 2023-05-15 14:20:26


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