Reverse String in Place with Two Pointers

🚀 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 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 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 52/60 — Walking Through Trees Problem Solved: Binary Tree Inorder Traversal Difficulty: Easy 💡 Approach: • Use recursion (Left → Root → Right) • Traverse left subtree • Visit current node • Traverse right subtree ⚡ Performance: Runtime: 0 ms (Clean & optimal recursion) 💡 What I Learned: • Depth-first traversal (DFS) basics • Recursion flow in trees • Importance of traversal order 🌿 Insight: Inorder traversal gives sorted output for BST — a powerful hidden property. From root to leaf, from left to right… each node tells a story, if you listen carefully. #leetcode #coding #programming #python #dsa #algorithms #binarytree #trees #dfs #recursion #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 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 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 47/60 — LeetCode Discipline Problem Solved: Swap Nodes in Pairs Difficulty: Medium 💡 Approach: • Use a dummy node to simplify head swaps • Track previous node before each pair • Swap adjacent nodes by rewiring pointers • Move forward pair by pair ⚡ Performance: Runtime: 0 ms Today’s lesson: Linked Lists do not forgive careless pointer work. One wrong connection, and the whole chain breaks. Mastering linked lists teaches patience, precision, and discipline— three qualities every strong programmer must possess. #leetcode #coding #programming #python #dsa #algorithms #linkedlist #pointers #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 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

🚀 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 66/60 — Decoding the Columns Problem Solved: Excel Sheet Column Number Difficulty: Easy 💡 Approach: • Treat the string like a base-26 number system • Convert each character → numerical value (A=1, B=2…) • Multiply previous result by 26 and add current value • Build the final number step by step ⚡ Performance: Runtime: 0 ms 💡 What I Learned: • Base conversion using characters • How positional value systems work (like decimal, binary) • Reversing logic of a previous problem (Title → Number) 🌿 Insight: Sometimes growth comes full circle… what you once converted forward— you must now learn to decode backward. #leetcode #coding #programming #python #dsa #algorithms #math #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 #mathproblems #interviewquestions #codinglife #buildinpublic #learnbydoing #codeeveryday #nevergiveup #motivation #successjourney #techcommunity