2016年1月9日

min stack
摘要： Implement a stack with min() function, which will return the smallest number in the stack.It should support push, pop and min operation all in O(1) co... 阅读全文
posted @ 2016-01-09 04:11 一心一念 阅读(152) 评论(0) 推荐(0)
Distinct Subsequences
摘要： Given a string S and a string T, count the number of distinct subsequences of T in S.A subsequence of a string is a new string which is formed from th... 阅读全文
posted @ 2016-01-09 03:01 一心一念 阅读(111) 评论(0) 推荐(0)

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