请求修改题面格式

P3414 SAC#1 - 组合数

@[chen_zhe](/user/8457)
by BurningEnderDragon @ 2021-05-16 11:06:14


@[SSerxhs](/user/29826)
by BurningEnderDragon @ 2021-05-16 11:50:58


@[BurningEnderDragon](/user/386876) fixed
by SSerxhs @ 2021-05-17 00:25:27


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