摘要: Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x < 10n. Example: Given n = 2, return 91. (The answer should be the 阅读全文
posted @ 2016-06-14 04:12 Grandyang 阅读(13713) 评论(0) 推荐(2)
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