Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle…

Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, …

Given m arrays, and each array is sorted in ascending order. Now you can pick up two integers from t…

Given an array consisting of n integers, find the contiguous subarray of given length k that has the…

Given an integer array, find three numbers whose product is maximum and output the maximum product. …

Given an m * n matrix M initialized with all 0‘s and several update operations. Operations are…

We define a harmonious array is an array where the difference between its maximum value and its mini…

Given an integer array with even length, where different numbers in this array represent different k…

In MATLAB, there is a very useful function called ‘reshape’, which can reshape a matrix …