Solving LeetCode 58 with Java

🔥 Day 58 of #100DaysOfCode Solved – Check Balanced String 🔍 What I did: Traversed the string and calculated the sum of digits at even and odd indices separately, then compared both sums to determine if the string is balanced. 💡 Key Learning: Practiced string traversal and indexing Improved understanding of even vs odd index logic Learned how to convert char to integer (c - '0') 🎯 Takeaway: Even simple index-based problems can strengthen your fundamentals and attention to detail. #Day58 #LeetCode #Java #ProblemSolving #CodingJourney #100DaysOfCode #DSA

Day: 96/365 📌 LeetCode POTD: Minimum Distance to Type a Word Using Two Fingers Hard Key takeaways/Learnings from this problem: 1. This problem is a great example of DP with state as both fingers’ positions, which feels tricky at first but clicks once you model it right. 2. Key learning: instead of deciding both fingers every time, fix one and optimize the movement of the other to reduce complexity. 3. Precomputing distances between characters makes transitions much faster and keeps the code clean. #POTD #365DaysOfCode #DSA #Java #ProblemSolving #LearningInPublic #Consistency 🥷

🚀 Day 33 of #128DaysOfCode 🧩 Problem Insight: The goal was to check whether a given string can be formed by repeating one of its substrings multiple times. 💡 Key Learning: Instead of checking all possible substrings (which can be inefficient), I learned an elegant trick: By concatenating the string with itself and removing the first and last characters, we can determine if the original string exists within it. ⚡ This approach helped me: - Improve my understanding of string patterns - Learn a smart optimization technique - Avoid brute-force solutions 🛠️ Concepts Practiced: - String manipulation - Pattern recognition - Optimized problem-solving approach 📈 Every day I’m getting better at identifying patterns and writing cleaner, more efficient code. #Day33 #128DaysOfCode #Java #DSA #CodingJourney #ProblemSolving #LeetCode

Day 52 : Practicing Binary Trees on LeetCode 💡 Today’s live practical session in Alpha Plus 7.0 we solve some Binary Trees bases questions on LeetCode to test our logic. What I practiced today: ✅ Binary Tree Execution: Reinforced our core concepts by solving practical problems and tracing the exact flow of the nodes. ✅ Preorder Traversal: tackled the "Binary Tree Preorder Traversal" problem on LeetCode. ✅ Build the logic breakdown #BinaryTree #LeetCode #ProblemSolving #DSA #Java #SoftwareEngineering #100DaysOfCode #ApnaCollege

🚀 Day 27/100 Days of Code Challenge Today’s problem: Find Peak Element (Leetcode 162) 🔍 What I learned: How to find a peak element efficiently without scanning the entire array Using Binary Search to reduce time complexity from O(n) to O(log n) Understanding how the “slope” of elements helps decide the search direction 🧠 Key Idea: Instead of checking every element, compare the middle element with its neighbor: If nums[mid] < nums[mid + 1] → move right Else → move left ✅ Example: Input: [1, 2, 3, 1] Output: 2 (index of peak element 3) Consistency is key 🔑 — improving problem-solving skills one day at a time! 💪 #Day27 #100DaysOfCode #LeetCode #BinarySearch #DSA #Java #CodingJourney

✅ LeetCode Top Interview 150 – Day 100 🎯 Today I solved Course Schedule II Key Idea : Use Topological Sort (BFS - Kahn’s Algorithm) Build graph and track indegree of each node Add nodes with indegree 0 to queue Process nodes and reduce indegree of neighbors If all courses are processed → valid order exists Else → cycle detected (not possible) This approach helps find a valid course order efficiently #DSA #Java #Leetcode #Day100

100 Days of Code Day - 24 🔁 Swap Nodes in Pairs – LeetCode Problem Solved a classic Linked List problem today! 💡 👉 Given a linked list, swap every two adjacent nodes without modifying values — only changing the links. ✅ Example: Input: [1,2,3,4] Output: [2,1,4,3] 💭 Approach: Used a dummy node and pointer manipulation to efficiently swap nodes in O(n) time and O(1) space. 📌 Key Learning: Understanding pointer handling is crucial for mastering Linked Lists. #LeetCode #Java #DSA #LinkedList #CodingJourney #ProblemSolving

🚀 Day 49 of my #100DaysOfCode Journey Today, I solved the LeetCode problem: Set Mismatch Problem Insight: Given an array containing numbers from 1 to n, one number is duplicated and one number is missing. The goal is to find both of them. Approach: • Used a frequency array to count occurrences of each number • Traversed the input array and updated frequency • Iterated from 1 to n: – If frequency is 2 → duplicate element – If frequency is 0 → missing element • Returned both values as the final result Time Complexity: O(n) Space Complexity: O(n) Key Learnings: • Frequency array is a simple and powerful technique for counting problems • Helps quickly identify missing and repeating elements • Clean and easy-to-understand approach for beginners Takeaway: Sometimes the simplest approach is the most effective. Mastering basic patterns like counting can solve many problems efficiently! #DSA #Java #LeetCode #100DaysOfCode #CodingJourney

Day 17 of #100DaysOfCode Solved Plus One (Easy) today. A simple but important problem that reinforces handling edge cases carefully. Key Idea: Traverse from the last digit, handle carry properly. Approach: Start from the end of the array If digit < 9 → increment and return If digit == 9 → make it 0 and carry forward If all digits are 9 → create new array with leading 1 Learning: Even the easiest problems test your attention to edge cases. Consistency > Complexity. #LeetCode #DSA #CodingJourney #Java #ProblemSolving #Consistency

#Day82 Of Problem Solving Solved today’s LeetCode Daily Question and got all test cases accepted. Focused on finding the minimum distance between the target element and the given start index. Kept the approach simple—iterated through the array and updated the minimum distance using Math.abs(). Clean logic, efficient, and gets the job done. Performance: Runtime: 1 ms Memory: 45.04 MB Small problems like this are a good reminder that clarity in thinking often beats overcomplication. Staying consistent with daily practice. #LeetCode #Java #ProblemSolving #DSA #CodingJourney #LeetCode #LinkedIn