注意特判'\r'
by jijidawang @ 2020-02-19 13:12:45
@[tcs06358](www.luogu.com.cn)
by jijidawang @ 2020-02-19 13:14:09
没事了，读入第一行的时候\n和\r没处理好
by tcs06358 @ 2020-02-19 13:14:34
@[tcs06358](/user/25332)
by jijidawang @ 2020-02-19 13:14:35