摘要：
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
摘要：
Given an array of integers, every element appears three times except for one. Find that single one. Note:Your algorithm should have a linear runtime c... 阅读全文
摘要：
Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complex... 阅读全文
摘要：
There are N children standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following req... 阅读全文