摘要：
Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文
摘要：
Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5,Return 例 i = 5的生成过程： i = 0 row = [1]; 内层循环不执行; allrows 阅读全文