摘要：
Given an array of length n that stores a stock's price in n consecutive days, Buy/Sell stock with at most K transactions to maximize profit. You must 阅读全文
摘要：
Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding elemen 阅读全文
摘要：
Implement wildcard pattern matching with support for '?' and '*'. '?' Matches any single character. '*' Matches any sequence of characters (including 阅读全文