1922. Count Good Numbers
1922. Count Good NumbersDifficulty: MediumTopics: Math, RecursionA digit string is good if the digits (0-indexed) at even indices are even and the digits at odd indices are prime (2, 3, 5, or 7).
For ...
Ninjas Training Coding Problem
Problem statement
Ninja is planing this ‘N’ days-long training schedule. Each day, he can perform any one of these three activities. (Running, Fighting Practice or Learning New Moves). Ea...
1534. Count Good Triplets
1534. Count Good TripletsDifficulty: EasyTopics: Array, EnumerationGiven an array of integers arr, and three integers a, b and c. You need to find the number of good triplets.A triplet (arr[i], arr[j]...
How to make a really Fast AI
Artificial Intelligence systems have made remarkable progress in recent years, with applications ranging from autonomous driving to natural language processing. However, these systems often specialize...
2179. Count Good Triplets in an Array
2179. Count Good Triplets in an ArrayDifficulty: HardTopics: Array, Binary Search, Divide and Conquer, Binary Indexed Tree, Segment Tree, Merge Sort, Ordered SetYou are given two 0-indexed arrays nums...
High-Level vs. Low-Level System Design
When designing a software system, engineers and architects work at different levels of abstraction. High-Level Design (HLD) and Low-Level Design (LLD) serve distinct purposes in the development lifecy...
AI Teaches Us How to Build AI: The New Era for Developers
These days, pretty much every app you open has some kind of AI built in. Like, Grammerly guesses what you’re gonna type next, Instagram shows you stuff you didn’t even know you wanted to see, shop...
The Ultimate Guide for Competitive Programming
(NB: Some users of dev.to are far better programming problem solvers than me. I'm more of an ace of all, master of none as my interests start from theoretical physics to pure math. But I composed this...
2537. Count the Number of Good Subarrays
2537. Count the Number of Good SubarraysDifficulty: MediumTopics: Array, Hash Table, Sliding WindowGiven an integer array nums and an integer k, return the number of good subarrays of nums.A subarray ...
Quick & Easy Intro to Data Structures & Algorithms for Beginners
In programming, data structures and algorithms (DSA) are the foundational building blocks that dictate how software applications handle data and perform tasks efficiently. Understanding these concepts...