题目地址:https://buuoj.cn/challenges#%E7%B2%BD%E5%AD%90%E7%9A%84%E6%9D%A5%E5%8E%86

题给了四个损坏的压缩包

没做过类似的题 遂上网搜wp

将'IComeFromAlibaba'都改为'ÿ'

修改后可正常打开

间距大的为1 较小的为0

然后根据题目提示用MD5加密

取32位 小写(记得去空格

 flag{d473ee3def34bd022f8e5233036b3345}

借鉴:https://blog.csdn.net/weixin_43790779/article/details/104160841?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~aggregatepage~first_rank_ecpm_v1~rank_v31_ecpm-1-104160841.pc_agg_new_rank&utm_term=BUUCTF%E7%B2%BD%E5%AD%90%E7%9A%84%E6%9D%A5%E5%8E%86&spm=1000.2123.3001.4430