字符串的前k个字符

状态	递交者	时间	内存	代码	递交时间
AC	曹雅萱	13ms	412 KiB	194 Bytes	2023-5-14 20:34:58
AC	AWM	13ms	384 KiB	190 Bytes	2023-5-5 20:09:10
AC	AWM	13ms	388 KiB	190 Bytes	2023-5-5 20:09:08
AC	AWM	13ms	384 KiB	190 Bytes	2023-5-5 20:09:09
AC	谢润轩	13ms	412 KiB	182 Bytes	2023-4-29 10:49:39
AC	AWM	13ms	436 KiB	190 Bytes	2023-5-5 20:09:12
AC	李旻轩	13ms	384 KiB	185 Bytes	2023-4-29 10:55:57
AC	贾博涵	13ms	420 KiB	190 Bytes	2023-4-29 10:53:25
AC	AWM	13ms	384 KiB	190 Bytes	2023-5-5 20:08:45
AC	wby	13ms	384 KiB	180 Bytes	2023-4-29 10:44:43
AC	AWM	13ms	384 KiB	190 Bytes	2023-5-5 20:08:48
AC	李睿瞳	14ms	440 KiB	176 Bytes	2023-4-30 13:08:08
AC	sky	14ms	420 KiB	206 Bytes	2023-4-29 10:37:50
AC	谢润轩	15ms	420 KiB	182 Bytes	2023-4-29 10:49:39