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动态规划：There areNchildren standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following ... 阅读全文
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Divide two integers without using multiplication, division and mod operator.思路：这道题属于数值处理的题目，对于整数处理的问题，在Reverse Integer中我有提到过，比较重要的注意点在于符号和处理越界的问题。对于这道... 阅读全文
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Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:getandset.get(key)- Get the valu... 阅读全文
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Givennpoints on a 2D plane, find the maximum number of points that lie on the same straight line.参考：http://blog.csdn.net/doc_sgl/article/details/17103... 阅读全文
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Two elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Note:A solution using O(n) space is ... 阅读全文
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A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.Return a deep copy ... 阅读全文