Swap Nodes in Pairs LeetCode Solution

🚀 Day 49/60 — LeetCode Discipline Problem Solved: Count and Say Difficulty: Medium 💡 Approach: • Start with base string "1" • Build each next sequence using Run-Length Encoding • Count consecutive digits • Append count + digit to form next string ⚡ Performance: Runtime: 7 ms (Efficient & Clean) 💡 Key Insight: Each term is a description of the previous one. You don’t compute the answer… you observe and narrate it. 💡 What I Learned: • Strong string manipulation • Pattern building step-by-step • Importance of handling edge cases (last group) Consistency is not loud. It is quiet, repetitive, and powerful. #leetcode #coding #programming #python #dsa #algorithms #strings #patternrecognition #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending

🚀 Day 69/60 — Finding What Changed Problem Solved: Find the Difference Difficulty: Easy 💡 Approach: • Use XOR (^) on all characters of both strings • Same characters cancel each other out • The remaining value gives the extra character • Convert back to character using chr() ⚡ Performance: Runtime: 0 ms 💡 What I Learned: • Clever use of bit manipulation (XOR) • How patterns cancel out in computations • Writing elegant and minimal solutions 🌿 Insight: Sometimes the difference isn’t loud or obvious… it quietly remains after everything else cancels out. And that subtle change makes all the difference. #leetcode #coding #programming #python #dsa #algorithms #strings #bitmanipulation #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending #stringproblems #interviewquestions #codinglife #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney #techcommunity

🚀 Day 55/60 — Refining the Structure Problem Solved: Remove Duplicates from Sorted List Difficulty: Easy 💡 Approach: • Traverse the linked list • Compare current node with next node • If duplicate → skip it • Else → move forward ⚡ Performance: Runtime: 0 ms (Optimal) 💡 What I Learned: • Linked list traversal • Pointer manipulation • Handling duplicates efficiently 🌿 Insight: In a sorted world, duplicates stand side by side… making them easier to eliminate. Simplicity is not weakness— it is mastery. #leetcode #coding #programming #python #dsa #algorithms #linkedlist #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending

🚀 Day 68/60 — Reversing the Fundamentals Problem Solved: Reverse String Difficulty: Easy 💡 Approach: • Use two pointers — one at the start, one at the end • Swap characters while moving inward • Continue until both pointers meet • Perform everything in-place (no extra space) ⚡ Performance: Runtime: 0 ms 💡 What I Learned: • Power of two-pointer technique • Writing memory-efficient (O(1)) solutions • Simplicity can still be optimal 🌿 Insight: Sometimes growth isn’t about adding more… it’s about turning things around, and seeing the same path from a wiser side. #leetcode #coding #programming #python #dsa #algorithms #strings #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending #stringproblems #interviewquestions #codinglife #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney #techcommunity

🚀 Day 58/60 — Keeping Only the True Ones Problem Solved: Remove Duplicates from Sorted List II Difficulty: Medium 💡 Approach: • Use a dummy node to handle edge cases • Traverse the list with two pointers (prev & curr) • Detect duplicate groups • Skip all nodes that have duplicates • Keep only distinct values ⚡ Performance: Runtime: 2 ms 💡 What I Learned: • Handling linked list edge cases • Difference between removing duplicates vs removing duplicate values entirely • Pointer manipulation mastery 🌿 Insight: Not everything repeated deserves to stay… Sometimes, strength lies in removing what’s common and preserving only what’s rare. #leetcode #coding #programming #python #dsa #algorithms #linkedlist #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending #linkedlistproblems #interviewquestions #codinglife #techcommunity #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney

🚀 Day 48/60 — LeetCode Discipline Problem Solved: Search in Rotated Sorted Array Difficulty: Medium 💡 Approach: • Apply modified Binary Search • Determine which half is sorted • Check if target lies in sorted half • Narrow search space accordingly ⚡ Performance: Runtime: 0 ms Today’s lesson: Not every sorted structure appears sorted at first glance. Sometimes order is hidden beneath transformation— and great programmers learn to recognize structure even in chaos. Mastering modified binary search is essential for interviews and competitive programming. #leetcode #coding #programming #python #dsa #algorithms #binarysearch #modifiedbinarysearch #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #trending #explorepage

🚀 Day 57/60 — The Art of Guessing Smart Problem Solved: Guess Number Higher or Lower Difficulty: Easy 💡 Approach: • Apply Binary Search • Adjust range based on API response • Narrow down until the correct number is found ⚡ Performance: Runtime: 11 ms 💡 What I Learned: • Binary search with conditions • Working with APIs (guess function) • Decision-based narrowing 🌿 Insight: Don’t guess blindly… guess wisely, and reduce uncertainty each step. #leetcode #coding #programming #python #dsa #algorithms #binarysearch #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending

🚀 Day 67/60 — Turning Words Around Problem Solved: Reverse Words in a String Difficulty: Medium 💡 Approach: • Split the string into words using split() • Store words in a list (ignoring extra spaces automatically) • Traverse the list in reverse order • Join them back with a single space ⚡ Performance: Runtime: 3 ms 💡 What I Learned: • Handling strings with irregular spaces • Importance of clean formatting in outputs • Reverse traversal logic in a practical scenario 🌿 Insight: Life, like a sentence, often feels scattered… but when you rearrange it with clarity, even chaos begins to make sense. #leetcode #coding #programming #python #dsa #algorithms #strings #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending #stringproblems #interviewquestions #codinglife #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney #techcommunity

🚀 Day 61/60 — Small Window, Big Insight Problem Solved: Minimum Size Subarray Sum Difficulty: Medium 💡 Approach: • Sliding Window (Two Pointers) • Expand window by increasing right pointer • Shrink window when sum ≥ target • Track minimum length during valid windows ⚡ Performance: Runtime: 15 ms 💡 What I Learned: • Efficient window-based optimization • How to reduce time complexity from brute force • Importance of shrinking window to find optimal answer 🌿 Insight: In long journeys… it is not the biggest steps that matter— but the smallest precise moves that bring you closer. #leetcode #coding #programming #python #dsa #algorithms #slidingwindow #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending #arrayproblems #interviewquestions #codinglife #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney #techcommunity

🚀 Day 62/60 — Multiplying Beyond Limits Problem Solved: Multiply Strings Difficulty: Medium 💡 Approach: • Simulate manual multiplication (like pen & paper) • Traverse both strings from right to left • Store intermediate results in an array • Handle carry and place values carefully ⚡ Performance: Runtime: 155 ms 💡 What I Learned: • Handling large numbers without built-in functions • Importance of index positioning (i + j logic) • Converting real-world methods into code 🌿 Insight: Not all problems allow shortcuts… sometimes you must return to basics— and build the answer, digit by digit. #leetcode #coding #programming #python #dsa #algorithms #strings #datastructures #problem-solving #developer #softwareengineer #100daysofcode #60daysofcode #codingjourney #competitiveprogramming #interviewprep #placements #internship #tech #computerscience #btech #aiml #studentdeveloper #dailycoding #developerlife #codingcommunity #softwaredeveloper #futureengineer #consistency #discipline #growthmindset #learncoding #codersofinstagram #techlife #grind #successmindset #explorepage #trending #stringproblems #interviewquestions #codinglife #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney #techcommunity