ActiveCoder的博客

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 this in palace? (This problem is in Easy Level) Ex

Write a method to replace all spaces in a string with ‘%20’. // there are actually no tricks in this problem.// the API can be a vector, however, the idea is the same.string repaceSpaces(string input

Write a method to decide if two strings are anagrams or not. There are two ways to solve this problem. // use the sort algorithm in C++.// Time complexity (nLgn), space o(1);bool isAnagrams(string a

Write code to reverse a C-Style String. (C-String means that “abcd” is represented as five characters, including the null character.) // This question is for C/C++ programmer.// #include if programm

Cracking the Code interview 1.1: Implement an algorithm to determine if a string has all unique characters and what if you can't use additional data structures.  (easy level) // First with extra dat

Assume you have a method isSubstring which checks if one word is a substring of another. Given two strings, s1 and s2, write code to check if s2 is a rotation of s1 using only one call to isSubstring

/* Imagine you have a square matrix, where each cell is filled with either black or white. Design an algorithm to find the maximum subsquare such that all four borders are filled with black pixe