摘要： Given a sorted array, remove the duplicates in place such that each element appear onlyonceand return the new length.Do not allocate extra space for another array, you must do this in place with constant memory.For example,Given input array A =[1,1,2],Your function should return length =2, and A is 阅读全文

摘要： Write code to reverse a C-Style String. (C-String means that “abcd” is represented as five characters, including the null character.) 阅读全文

摘要： Implement an algorithm to determine if a string has all unique characters.What if you can not use additional data structures? 阅读全文