2020年8月27日
PAT 甲级 1023 Have Fun with Numbers (20分)
摘要： Notice that the number 123456789 is a 9-digit number consisting exactly the numbers from 1 to 9, with no duplication. Double it we will obtain 2469135 阅读全文
posted @ 2020-08-27 10:34 $KAMISAMALZ 阅读(104) 评论(0) 推荐(0) 编辑