Count and Say LeetCode Solution in Python

🚀 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 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 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 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 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 51/60 — LeetCode Journey Continues Problem Solved: Merge Sorted Array Difficulty: Easy 💡 Approach: • Extract valid elements from nums1 • Add elements of nums2 • Sort the combined array • Place back into nums1 ⚡ Performance: Runtime: 0 ms (Optimal execution) 💡 Better Insight: Instead of extra space + sorting, we can solve in-place using 3 pointers from the end. 💡 What I Learned: • Array manipulation fundamentals • Importance of in-place operations • Optimizing space complexity Small problems teach big discipline. Master the basics, and the advanced will bow. #leetcode #coding #programming #python #dsa #algorithms #arrays #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 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 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