The Valid Mountain Array Algorithm
Given an array A of integers, return true if and only if it is a valid mountain array. Recall that A is a mountain array if and only if: …
Tag: Java coding exercise
The Algorithm to Construct the Rectangle Given Its Area
For a web developer, it is very important to know how to design a web page’s size. So, given a specific rectangular web page’s area, your job by now …
Compute the Sum of Even Numbers After Queries
We have an array A of integers, and an array queries of queries. For the i-th query val = queries, index = queries, we add val to A. Then, …
The Intersection Algorithm of Two Arrays using Hash Maps in C++/Java/JavaScript
Given two arrays, write a function to compute their intersection. Example 1: Input: nums1 = , nums2 = Output: Example 2: Input: nums1 = , nums2 = Output: Note: …
How to Find Common Characters in an array of Strings?
Given an array A of strings made only from lowercase letters, return a list of all characters that show up in all strings within the list (including duplicates). For …
