摘要: PAT A1069/B1019 The Black Hole of Numbers (20分) For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in n 阅读全文
posted @ 2020-02-01 16:36 程序员小应 阅读(267) 评论(0) 推荐(0) 编辑