摘要：
Given a root of Binary Search Tree with unique value for each node. Remove the node with given value. If there is no such a node with given value in t... 阅读全文
摘要：
Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i... 阅读全文
摘要：
Given an array ofnobjects with k different colors (numbered from 1 to k), sort them so that objects of the same color are adjacent, with the colors in... 阅读全文
摘要：
Write an efficient algorithm that searches for a value in an m x n matrix, return the occurrence of it.This matrix has the following properties: * In... 阅读全文