摘要: Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Given a non-negative integer n, count all numbers with uni 阅读全文
posted @ 2016-06-20 11:09 新一代的天皇巨星 阅读(517) 评论(0) 推荐(0)