摘要: $Description$ "题面" 求$[l,r]$有多少个数满足数位中出现长度$ =2$的回文数,比如$121、110$都满足 $l,r include include include define ll long long define re register define maxn 1010 阅读全文
posted @ 2019-11-12 09:37 __Liuz 阅读(114) 评论(0) 推荐(0) 编辑