摘要： Ugly NumberWrite a program to check whether a given number is an ugly number.Ugly numbers are positive numbers whose prime factors only include2, 3, 5... 阅读全文

摘要： Valid AnagramGiven two stringssandt, write a function to determine iftis an anagram ofs.For example,s= "anagram",t= "nagaram", return true.s= "rat",t=... 阅读全文

摘要： Different Ways to Add ParenthesesGiven a string of numbers and operators, return all possible results from computing all the different possible ways t... 阅读全文

摘要： Search a 2D Matrix IIWrite an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each ... 阅读全文

摘要： Sliding Window MaximumGiven an arraynums, there is a sliding window of sizekwhich is moving from the very left of the array to the very right. You can... 阅读全文

摘要： Product of Array Except SelfGiven an array ofnintegers wheren> 1,nums, return an arrayoutputsuch thatoutput[i]is equal to the product of all the eleme... 阅读全文

摘要： Delete Node in a Linked ListWrite a function to delete a node (except the tail) in a singly linked list, given only access to that node.Supposed the l... 阅读全文

摘要： 一、开场白做机器学习的对这几个词应该比较熟悉了。最好是拿到全部数据，那就模型慢慢选，参数慢慢调，一轮一轮迭代，总能取得不错效果。但是面对新来数据，怎么能利用已经训练好的模型，把新的信息加进去？所以有很多人，包括我们组，一直想做好在线增量式学习。(1)来一波新数据，(2)抽信息更新模型，(3)扔掉那些... 阅读全文

摘要： Number of Digit OneGiven an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n.For example:Gi... 阅读全文

摘要： Lowest Common Ancestor of a Binary TreeGiven a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.According to thedefin... 阅读全文