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String manipulation without in built methods in Python Part 1

Great content so far! Here's a cleaned-up and polished version of your section, with some improvements to grammar, structure, and readability while keeping the friendly and educational tone:The goal o...

23.04.2025 0 Read More

1399. Count Largest Group

1399. Count Largest GroupDifficulty: EasyTopics: Hash Table, MathYou are given an integer n.Each number from 1 to n is grouped according to the sum of its digits.Return the number of groups that have ...

23.04.2025 0 Read More

1128. Number of Equivalent Domino Pairs

1128. Number of Equivalent Domino PairsDifficulty: EasyTopics: Array, Hash Table, CountingGiven a list of dominoes, dominoes[i] = [a, b] is equivalent to dominoes[j] = [c, d] if and only if either (a ...

04.05.2025 0 Read More

🔍 How MongoDB Indexing Works Internally: B+Tree Structure, Performance Impact & Best Practices

Indexing is the backbone of database performance. In MongoDB, indexes are not just a luxury—they're essential for building scalable, performant applications. But how do they really work under the ho...

04.05.2025 0 Read More

Spike detection: using simple algorithms to pinpoint analysis

Users look at their performance monitoring dashboards and see this: They can view the numbers and possibly inspect them to see the raw data of any point they choose, but it's really a lot of work. fi...

23.04.2025 0 Read More

Solving the Two Sum Problem in Rust: Brute Force vs HashMap

I’ve been diving into Rust and decided to challenge myself with some LeetCode problems. One of the first ones I tackled was the classic Two Sum problem — and, it turned out to be a great way to pr...

24.04.2025 0 Read More

2799. Count Complete Subarrays in an Array

2799. Count Complete Subarrays in an ArrayDifficulty: MediumTopics: Array, Hash Table, Sliding WindowYou are given an array nums consisting of positive integers.We call a subarray of an array complete...

24.04.2025 0 Read More

Lychrel number

A Lychrel number is a natural number that cannot form a palindrome through the iterative process of reversing its digits and adding the resulting numbers. This process is often referred to as the 196-...

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2845. Count of Interesting Subarrays

2845. Count of Interesting SubarraysDifficulty: MediumTopics: Array, Hash Table, Prefix SumYou are given a 0-indexed integer array nums, an integer modulo, and an integer k.Your task is to find the co...

25.04.2025 0 Read More

Efficient Vertex Cover Approximation via Iterative Dominating Set Transformations

Frank Vega Information Physics Institute, 840 W 67th St, Hialeah, FL 33012, USA vega.frank@gmail.com Problem Statement Vertex Cover Problem Given an undirected graph G=(V,E)G = (...

25.04.2025 0 Read More

String manipulation without in built methods in Python Part 1

1399. Count Largest Group

1128. Number of Equivalent Domino Pairs

🔍 How MongoDB Indexing Works Internally: B+Tree Structure, Performance Impact & Best Practices

Spike detection: using simple algorithms to pinpoint analysis

Solving the Two Sum Problem in Rust: Brute Force vs HashMap

2799. Count Complete Subarrays in an Array

Lychrel number

2845. Count of Interesting Subarrays

Efficient Vertex Cover Approximation via Iterative Dominating Set Transformations

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