摘要： 题目描述： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given 阅读全文

摘要： 题目描述： Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3,Return [1,3,3,1]. 解题思路： 每次在上一个list前面插入1，然后后面的每两个间相加赋值给前一 阅读全文

摘要： 题目描述：Given a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level).For example:Given binary tree{... 阅读全文

摘要： 题目描述：Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.解题思路：对于阶乘而言，也就是1*2*3*...... 阅读全文

摘要： 转载自：http://blog.csdn.net/zhongkejingwang/article/details/43053513 在网上看到有很多文章介绍SVD的，讲的也都不错，但是感觉还是有需要补充的，特别是关于矩阵和映射之间的对应关系。前段时间看了国外的一篇文章，叫A Singularly V 阅读全文

摘要： 题目描述：GivennumRows, generate the firstnumRowsof Pascal's triangle.For example, givennumRows= 5,Return[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6... 阅读全文

摘要： 题目描述：Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit ... 阅读全文

摘要： 题目描述：Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root).Fo... 阅读全文

摘要： 题目描述：Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and no... 阅读全文

摘要： 题目描述：You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stoppi... 阅读全文