鱼弦：公众号【红尘灯塔】，CSDN博客专家、内容合伙人、新星导师、全栈领域优质创作者、51CTO(Top红人+专家博主)、github开源爱好者（go-zero源码二次开发、游戏后端架构https://github.com/Peakchen）基于物联网的门禁与考勤系统（阿里云）介绍基于物联网的门禁与考勤系统（阿里云）

Description552.StudentAttendanceRecordII(Hard)Anattendancerecordforastudentcanberepresentedasastringwhereeachcharactersignifieswhetherthestudentwasabsent,late,orpresentonthatday.Therecordonlycontainsthefollowingthre

/***552.StudentAttendanceRecordII*https://leetcode.com/problems/student-attendance-record-ii/*Anattendancerecordforastudentcanberepresent

/***551.StudentAttendanceRecordI*Youaregivenastringsrepresentinganattendancerecordforastudentwhereeachcharactersignifieswhetherthe