摘要：
Description Given a positive integer n, find the number of non-negative integers less than or equal to n, whose binary representations do NOT contain 阅读全文
摘要：
descption We have a sorted set of digits D, a non-empty subset of {'1','2','3','4','5','6','7','8','9'}. (Note that '0' is not included.) Now, we writ 阅读全文