摘要： Write an algorithm such that if an element in an MxN matrix is 0, its entire row and column are set to 0.There is a same problem in leetcode. We could... 阅读全文

摘要： Given an image represented by an NxN matrix, where each pixel in the image is 4 bytes, write a method to rotate the image by 90 degrees. Can you do th... 阅读全文

摘要： Implement a method to perform basic string compression using the counts of repeated characters. For example, the string aabcccccaaa would become a2blc... 阅读全文

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