摘要：
题目描述:(链接）Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.解题思路： 1 class Sol... 阅读全文
摘要：
题目描述: (链接）GivennumRows, generate the firstnumRowsof Pascal's triangle.For example, givennumRows= 5,Return[ [1], [1,1], [1,2,1], [1,3,3,1], [... 阅读全文