Deckmatch’s Post

I recently attended an interview at a high-tech company and they asked me an interesting question. Here it is: Alice and Bob play a game: Alice thinks of a number between 1 and 100 and Bob has to find out what number that is. He is allowed to ask questions that Alice can only answer with “Yes” or “No”. After how many questions does Bob know the number for sure? Who can guess the answer? Share your thoughts in the comments! #interview #puzzle #hightech #logic #brainteaser #questions #searchengine #programming #hr

I’ve compiled a list of 75 essential LeetCode questions that cover core concepts and techniques across various problem categories. This list was incredibly useful during my last job hunt, focusing on the most impactful questions. It’s a great resource for anyone looking to sharpen their problem-solving skills and prepare effectively for interviews💻📚 Here are some array-based questions to enhance your problem-solving skills: 1.Two Sum: Find indices of two numbers that add up to a target 2.ContainsDuplicate:Find Duplicates: Check for duplicates in an array 3.Find Minimum In Rotated Sort Array These problems cover a range of techniques including sliding window, hashing, and sorting💻📚 Follow Daily For More Problems Scaler Community Members #LeetCode #30DaysOfCoding #Programming #ProblemSolving #SoftwareDevelopment #InterviewPrep #Developers #SoftwareEngineering #Tech #CodingChallenge

Article 43 of 100 #RoadTo100Articles Did you know that you can KISS Your Code 💋 ?? You must read this 😂 🔗 https://lnkd.in/e_wCfn2X #interviews #Algorithms #CleanCode #SoftwareEngineering #TechTips #Coding #Programming #TechEducation #LearnToCode #Engineering #TechCareers #CodeNewbies

🚀 LeetCode Daily Problem Explanation for June 4th! 🚀 -- These are my accepted solutions, I would appreciate any optimisations in the comments !! -- 📝 Problem: Given a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built with those letters. Letters are case sensitive, for example, "Aa" is not considered a palindrome. 🏷️ Tag : Easy 🔍 Examples: Example 1: Input: s = "abccccdd" Output: 7 Explanation: One longest palindrome that can be built is "dccaccd", whose length is 7. Example 2: Input: s = "a" Output: 1 Explanation: The longest palindrome that can be built is "a", whose length is 1. 💡 Intuition A simple observation can be made: for a string to form a palindrome, all characters should have even counts, or all characters should have even counts except for one character that can have an odd count. 🛠️ Approach 1️⃣ Count the frequency of each character in the string using two arrays: one for lowercase letters and one for uppercase letters. 2️⃣ Calculate the number of characters that have an odd count. 3️⃣ If there are no characters with an odd count, the length of the longest palindrome is the length of the string. 4️⃣ If there are characters with odd counts, the length of the longest palindrome is the length of the string minus the number of odd counts plus one (since we can place one odd character in the center). ⏲️ Complexity Time complexity: 𝑂(𝑛) O(n), where 𝑛 is the length of the string. We iterate over the string to count character frequencies and then iterate over the counts. Space complexity: 𝑂(1) O(1), because the space used for the frequency arrays is constant (52 elements). -- Follow Kashyap Kale for daily code explanations -- #Coding #Programming #Algorithm #Tech #SoftwareEngineering #Developer #CodeNewbie #LinkedInTech #ProblemSolving #DSA #interviews #Cpp

Easy tech interview prep hack: Use real flash cards There are so many algorithms, data structures, and jargon words to remember for your interviews that it can be overwhelming. I’ve found that just writing stuff down on flash cards helps me to memorize things one concept at a time. They’re super portable and even the time I spend writing them out is useful for helping me lock in stuff like algo patterns, Big O time complexities, and design principles. #softwareengineer #programming #techinterview #coding #leetcode

Boost your interview prep with 50 OOP questions! 🚀 Sharpen your skills in inheritance, polymorphism, and more. Perfect for developers at any level. Dive in now! #Programming #InterviewPrep #OOP #TechCareers

I hate DSA and Leetcode 🤷 There, I said it. I struggled a lot with solving Leetcode questions, costing me many job opportunities. The way companies hire, you're almost forced to solve them—there's no choice. Randomly tackling Leetcode questions didn’t work for me. So, after spending a lot of time figuring out the optimal approach, I identified the frequently asked patterns in interviews: → Two-pointer technique → Sliding window → Fast and slow pointers → Tree traversal → Depth-first search (DFS) → Binary search → Dynamic programming Solving 10-15 questions from each pattern (around 100) is enough to cover most interview questions. Start small, focus on one pattern at a time, and build your confidence. I won’t say it’s easy, but it’s definitely doable with a structured approach. And if you’re stuck, you can get help from senior engineers at Preplaced. You can connect with them for free here: https://lnkd.in/g7VgfP3z They will help you focus on the right questions, understand the patterns, and approach Leetcode strategically, saving you a lot of time and increasing your chances of success in technical interviews. Try it out! 💫 #leetcode #DSApatterns #collab #preplacedcollab #techinterviews

Hello folks, #interviewBit #Problem ⤵ 🎉 Just solved the "Next Permutation" coding problem on #InterviewBit! 💻✨ I'm excited to share that I successfully tackled the "Next Permutation" problem on #InterviewBit, a challenging exercise in algorithmic problem-solving. 💡💪 #Explanation:- In this problem, I implemented an efficient algorithm to find the next permutation of a given sequence of numbers, which is a fundamental concept in combinatorics and computer science. By understanding and applying the logic behind permutations, I was able to optimize the solution and achieve the desired outcome. 🚀🔍Solving this problem not only tested my coding skills but also reinforced my understanding of important concepts such as array manipulation, sorting algorithms, and problem-solving strategies . 💡🔧I'm grateful for the opportunity to tackle such stimulating challenges on #InterviewBit and continue honing my skills as a developer. 💼💡 #InterviewBit #CodingChallenge #ProblemSolving #NextPermutation #Algorithm #DeveloperJourney 🌟 #Java #Coding #Algorithms #Programming #logicalThinking #javaprogramming #javadeveloper #30dayschallenge Coding Nexus

🚀 LeetCode Challenge: [🔥Day 307] 🔍 Problem Title: ❓Combination Sum II 📝 Description: 🧐Given a collection of candidate numbers (candidates) and a target number (target), find all unique combinations in candidates where the candidate numbers sum to target. Each number in candidates may only be used once in the combination. Note: The solution set must not contain duplicate combinations.   Example 1: Input: candidates = [10,1,2,7,6,1,5], target = 8 Output: [ [1,1,6], [1,2,5], [1,7], [2,6] ] Example 2: Input: candidates = [2,5,2,1,2], target = 5 Output: [ [1,2,2], [5] ]   Constraints: 1 <= candidates.length <= 100 1 <= candidates[i] <= 50 1 <= target <= 30 🔗Link to Problem: https://lnkd.in/dPyJyfVn ✨ Why this Challenge is Worth Your Time: Sharpen your problem-solving skills. Enhance your algorithmic understanding. Perfect for interview preparation! #LeetCode #CodingChallenge #ProblemSolving #Tech #Coding #Programming #SoftwareDevelopment #Algorithm

🚀 LeetCode's Top 150 Interview Questions 🚀 🌟 Question: 5 Majority Element 🌟 Problem Statement: Given an array nums of size n, return the majority element. The majority element is the element that appears more than ⌊n / 2⌋ times. You may assume that the majority element always exists in the array. Example 1: 📥 Input:nums = [3,2,3] 📤 Output:3 Example 2: 📥 Input:nums = [2,2,1,1,1,2,2] 📤 Output:2 Constraints: n == nums.length 1 <= n <= 5 * 10^4 -10^9 <= nums[i] <= 10^9 Solution (Moore's Voting algorithm) package top150InterviewQuestion; public class MajorityElement {   public static int majorityElement(int nums[]) {     int candidate = 0;     int count = 0;           for (int i = 0; i < nums.length; i++) {       if (count == 0) {         candidate = nums[i];       }       if (nums[i] == candidate) {         count++;       } else {         count--;       }     }     return candidate;      }   public static void main(String[] args) {     int nums[] = {1,1,2,2,2};           MajorityElement obj = new MajorityElement();     int result = obj.majorityElement(nums);           System.out.println(result);   } } In this solution, we use Moore's Voting Algorithm to find the majority element efficiently. The algorithm maintains a candidate and a count, updating them as we iterate through the array to find the element that appears more than half the time. Stay tuned for more solutions as I continue my journey through LeetCode's Top 150 Interview Questions! 🔖 #LeetCode #Coding #InterviewPrep #Java #ProblemSolving #Tech #CodingChallenge #DeveloperLife #TechCareer #LearnToCode #Programmer #JavaProgramming #TechJourney #TechCommunity #SoftwareDevelopment #CodingLife