How std::vectors are ordered in C++ — Problem statement Given an array intervals where intervals[i] = [li, ri] represent the interval [li, ri), remove all intervals that are covered by another interval in the list. The interval [a, b) is covered by the interval [c, d) if and only if c <= a and b <= d. Return the…

With Complete Code in C++, Explanation, Complexity Analysis and Discussion — Problem statement Given two strings s and t, return true if t is an anagram of s, and false otherwise. An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. Example 1 Input: s = "anagram", t =…

How a reversed iteration can improve performance — Problem statement Given an array of integers temperatures representing the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the i-th day to get a warmer temperature. …

How to use std::vector as a std::stack — Problem statement Given two strings s and t, return true if they are equal when both are typed into empty text editors. '#' means a backspace character. Note that after backspacing an empty text, the text will continue empty. Example 1 Input: s = "ab#c", t = "ad#c" Output: true Explanation: Both s and t become…

An example of the Prefix Sum method — Problem Statement Given an array of integers nums and an integer k, return the total number of continuous subarrays whose sum equals to k. Example 1 Input: nums = [1,1,1], k = 2 Output: 2 Example 2 Input: nums = [1,2,3], k = 3 Output: 2 Constraints 1 <= nums.length <= 2 * 10^4. -1000 <= nums[i]…

How To Build A Professional Online Presence — Today, having a professional online presence is as essential as a good resume to land your dream job. Just because you are not in the office all day doesn’t mean you don’t have to look professional. Here are some tips on how to build a professional online presence for tech…

An example of using std::priority_queue — Problem statement You are given an array of integers stones where stones[i] is the weight of the i-th stone. We are playing a game with the stones. On each turn, we choose the heaviest two stones and smash them together. Suppose the heaviest two stones have weights x and y with x…

The importance of word choice — When building a resume, content is key. The design and layout of your resume are important, but recruiters are primarily looking at your resume content. Understanding which words to use and how to phrase them effectively will go a long way toward landing you a job interview. The Dos Some tips for…

Using std::vector as a stack — Problem statement You are keeping score for a baseball game with strange rules. The game consists of several rounds, where the scores of past rounds may affect future rounds' scores. At the beginning of the game, you start with an empty record. You are given a list of strings ops, where ops[i]…