摘要:
Description: You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct wa 阅读全文
摘要:
使用vector 在解决一些问题的时候确实非常高效。 可以不像Array 那样一个一个去查。 可以大幅度缩减代码实现的时间。 Given a string, find the length of the longest substring without repeating characters. 阅读全文