摘要： Write a method to replace all spaces in a string with'%20'. You may assume that the string has sufficient space at the end of the string to hold the a... 阅读全文

摘要： Description: Given two strings, write a method to decide if one is a permutation of the other.We could use the same idea from CTCI 1.1. The only diffe... 阅读全文

摘要： Since I mainly use Java, this problem seems meaning less for me to implement it with Java. Just use StringBuilder to append each character in string f... 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 structure?In order to know whether ... 阅读全文