LeetCode – 28. Implement strStr()

LeetCode – 28. Implement strStr()

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

LeetCode – 605. Can Place Flowers

LeetCode – 605. Can Place Flowers

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

LeetCode – 624. Maximum Distance in Arrays

LeetCode – 624. Maximum Distance in Arrays

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

643. Maximum Average Subarray I

643. Maximum Average Subarray I

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

LeetCode – 628. Maximum Product of Three Numbers

LeetCode – 628. Maximum Product of Three Numbers

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

LeetCode –  598. Range Addition II

LeetCode – 598. Range Addition II

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

LeetCode – 594. Longest Harmonious Subsequence

LeetCode – 594. Longest Harmonious Subsequence

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

LeetCode –  575. Distribute Candies

LeetCode – 575. Distribute Candies

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

LeetCode – 566. Reshape the Matrix

LeetCode – 566. Reshape the Matrix

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

LeetCode – 561. Array Partition I

LeetCode – 561. Array Partition I

Given an array of 2n integers, your task is to group these integers into n pairs of integer, say (a1…

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