@[LLEeeeEe](/user/1068330) 这题要用桶排
就是for(int i=1;i<=n;i++)cin>>b;a[b]++
by chenhongyu1215 @ 2024-02-24 11:33:44
桶排自带去重功能，不过输出是a[i]是数量，i是数
by chenhongyu1215 @ 2024-02-24 11:35:29