I \' ll keep editing this post with the posts that I write in the discuss section of different questions.\nAlso, will post link to this post in my each dicuss posts if someone would like these posts. \nThe following link contain my solution for that question. \nThere are a lot of solutions that I have written in discuss section but haven\'t added here. Will add those soon.\nIf you find a code that is unreadable that\'ll probably due to my inexperience in coding. You\'ll see the improvement in my new coding solutions. \n\nThe List Starts from here:\n[2. Add Two Numbers](https://leetcode.com/problems/add-two-numbers/discuss/1013967/Python3-or-Easy-to-Understand-or-Add-Two-Numbers)\n[6. ZigZag Conversion](https://leetcode.com/problems/zigzag-conversion/discuss/1190069/PythonPython3-ZigZag-Conversion)\n[13. Roman To Integer](https://leetcode.com/problems/roman-to-integer/discuss/1074782/PythonPython3-Roman-to-Integer)\n[19. Remove Nth Node From End of List](https://leetcode.com/problems/remove-nth-node-from-end-of-list/discuss/1105131/PythonPython3-Remove-Nth-Node-From-End-of-List)\n[21. Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists/discuss/1002085/Python3-Easy-to-Understand-or-Iterative-or-Merge-Two-Sorted-Lists)\n[31. Next Permutation](https://leetcode.com/problems/next-permutation/discuss/1256111/pythonpython3-next-permutation)\n[43. Multiply Strings](https://leetcode.com/problems/multiply-strings/discuss/1273019/pythonpython3-multiply-strings-using-queue)\n[49. Group Anagrams](https://leetcode.com/problems/group-anagrams/discuss/1092464/PythonPython3-Group-Anagrams)\n[54. Spiral Matrix](https://leetcode.com/problems/spiral-matrix/discuss/1104234/PythonPython3-Spiral-Matrix)\n[60. Permutation Sequence](https://leetcode.com/problems/permutation-sequence/discuss/697196/PythonPython3-Permutation-Sequence)\n[61. Rotate List](https://leetcode.com/problems/rotate-list/discuss/1286517/pythonpython3-rotate-list)\n[66. Plus One](https://leetcode.com/problems/plus-one/discuss/722520/PythonPython3-Plus-One-(One-Liner))\n[73. Set Matrix Zeroes](https://leetcode.com/problems/set-matrix-zeroes/discuss/1414441/pythonpython3-set-matrix-zeros)\n[82. Remove Duplicates from Sorted List II](https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/discuss/1003906/Python3-or-Easy-to-Understand-or-Iterative-or-Remove-Duplicates-from-Sorted-List-II)\n[94. Binary Tree Inorder Traversal](https://leetcode.com/problems/binary-tree-inorder-traversal/discuss/1058537/PythonPython3-Binary-Tree-Inorder-Traversal)\n[101. Symmetric Tree](https://leetcode.com/problems/symmetric-tree/discuss/1193955/pythonpython3-symmetric-tree)\n[102. Binary Tree Level Order Traversal](https://leetcode.com/problems/binary-tree-level-order-traversal/discuss/1095685/PythonPython3-Binary-Tree-Level-Order-Traversal)\n[103. Binary Tree Zigzag Level Order Traversal](https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/discuss/1095733/PythonPython3-Binary-Tree-ZigZag-Level-Order-Traversal)\n[107. Binary Tree Level Order Traversal II](https://leetcode.com/problems/binary-tree-level-order-traversal-ii/discuss/1095711/PythonPython3-Binary-Tree-Level-Order-Traversal-ll)\n[109. Convert Sorted List to Binary Search Tree](https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/discuss/1250057/PythonPython3-Convert-Sorted-List-to-Binary-Search-Tree)\n[110. Balanced Binary Tree](https://leetcode.com/problems/balanced-binary-tree/discuss/1295762/pythonpython3-balanced-binary-tree)\n[111. Minimum Depth of Binary Tree](https://leetcode.com/problems/minimum-depth-of-binary-tree/discuss/1207164/pythonpython3-minimum-depth-of-binary-tree)\n[112. Path Sum](https://leetcode.com/problems/path-sum/discuss/1190170/pythonpython3-path-sum)\n[114. Flatten Binary Tree to Linked List](https://leetcode.com/problems/flatten-binary-tree-to-linked-list/discuss/1205464/pythonpython3-flatten-binary-tree-to-linked-list)\n[116. Populating Next Right Pointers in Each Node](https://leetcode.com/problems/populating-next-right-pointers-in-each-node/discuss/1102368/PythonPython3-Populating-Next-Right-Pointers-in-Each-Node)\n[117. Populating Next Right Pointers in Each Node II](https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/discuss/1102366/PythonPython3-Populating-Next-Right-Pointers-in-Each-Node-ll)\n[118. Pascal\'s Triangle](https://leetcode.com/problems/pascals-triangle/discuss/1169062/pythonpython3-pascals-triangle)\n[141. Linked List Cycle](https://leetcode.com/problems/linked-list-cycle/discuss/1048660/PythonPython3-or-Linked-List-Cycle-or-Two-pointer-Approach)\n[151. Reverse Words in a String](https://leetcode.com/problems/reverse-words-in-a-string/discuss/737151/PythonPython3-Reverse-Words-in-a-String)\n[161. One Edit Distance](https://leetcode.com/problems/one-edit-distance/discuss/1494315/pythonpython3-one-edit-distance)\n[168. Excel Sheet Column Title](https://leetcode.com/problems/excel-sheet-column-title/discuss/1288431/pythonpython3-excel-sheet-column-title)\n[202. Happy Number](https://leetcode.com/problems/happy-number/discuss/1083457/PythonPython3-Happy-Number)\n[222. Count Complete Tree Nodes](https://leetcode.com/problems/count-complete-tree-nodes/discuss/701577/PythonPython3-Count-Complete-Tree-Nodes)\n[226. Invert Binary Tree](https://leetcode.com/problems/invert-binary-tree/discuss/1210714/pythonpython3-invert-binary-tree)\n[231. Power of Two](https://leetcode.com/problems/power-of-two/discuss/677163/PythonPython3-Power-of-Two)\n[239. Sliding Window Maximum](https://leetcode.com/problems/sliding-window-maximum/discuss/714895/PythonPython3-Sliding-Window-Maximum)\n[249. Group Shifted Strings](https://leetcode.com/problems/group-shifted-strings/discuss/1092544/PythonPython3-Group-Shifted-Strings)\n[257. Binary Tree Paths](https://leetcode.com/problems/binary-tree-paths/discuss/1191925/pythonpython3-binary-tree-paths)\n[268. Missing Number](https://leetcode.com/problems/missing-number/discuss/1092210/PythonPython3-2-One-liner-Solutions)\n[284. Peeking Iterator](https://leetcode.com/problems/peeking-iterator/discuss/1056929/PythonPython3-Peeking-Iterator)\n[347. Top K Frequent Elements](https://leetcode.com/problems/top-k-frequent-elements/discuss/740463/PythonPython3-Top-K-Frequent-Elements)\n[392. Is Subsequence](https://leetcode.com/problems/is-subsequence/discuss/678506/PythonPython3-Is-Subsequence)\n[404. Sum of Left Leaves](https://leetcode.com/problems/sum-of-left-leaves/discuss/1484224/pythonpython3-sum-of-left-leaves)\n[412. Fizz Buzz](https://leetcode.com/problems/fizz-buzz/discuss/633300/Python-one-liner)\n[429. N-ary Tree Level Order Traversal](https://leetcode.com/problems/n-ary-tree-level-order-traversal/discuss/1095683/PythonPython3-N-ary-Tree-Level-Order-Traversal)\n[452. Minimum Number of Arrows to Burst Balloons](https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/discuss/1480092/pythonpython3-minimum-number-of-arrows-to-burst-balloons)\n[462. Minimum Moves to Equal Array Elements II](https://leetcode.com/problems/minimum-moves-to-equal-array-elements-ii/discuss/1090585/PythonPython3-Minimum-Moves-to-Equal-Array-Element-ll)\n[468. Validate IP Address](https://leetcode.com/problems/validate-ip-address/discuss/690014/PythonPython3-Hard-not-so-understandable-solution-to-Validate-IP-Address)\n[485. Max Consecutive Ones](https://leetcode.com/problems/max-consecutive-ones/discuss/1047216/PythonPython3-or-Max-Consecutive-Ones)\n[513. Find Bottom Left Tree Value](https://leetcode.com/problems/find-bottom-left-tree-value/discuss/1484249/pythonpython3-find-bottom-left-tree-value)\n[515. Find Largest Value in Each Tree Row](https://leetcode.com/problems/find-largest-value-in-each-tree-row/discuss/1484247/pythonpython3-find-largest-value-in-each-tree-row)\n[559. Maximum Depth of N-ary Tree](https://leetcode.com/problems/maximum-depth-of-n-ary-tree/discuss/1200514/PythonPython3-Maximum-Depth-of-N-ary-Tree)\n[581. Shortest Unsorted Continuous Subarray](https://leetcode.com/problems/shortest-unsorted-continuous-subarray/discuss/1083225/PythonPython3-Shortest-Unsorted-Continuous-Subarray)\n[582. Kill Process](https://leetcode.com/problems/kill-process/discuss/1067938/PythonPython3-Kill-Process)\n[594. Longest Harmonious Subsequence](https://leetcode.com/problems/longest-harmonious-subsequence/discuss/1049594/PythonPython3-Longest-Harmonious-Subsequence)\n[623. Add One Row to Tree](https://leetcode.com/problems/add-one-row-to-tree/discuss/1102438/PythonPython3-Add-One-Row-to-Tree)\n[654. Maximum Binary Tree](https://leetcode.com/problems/maximum-binary-tree/discuss/1533752/Python-Python3-Maximum-Binary-Tree)\n[658. Find K Closest Elements](https://leetcode.com/problems/find-k-closest-elements/discuss/1057212/PythonPython3-Find-K-Closest-Elements-or-One-Liner)\n[662. Maximum Width of Binary Tree](https://leetcode.com/problems/maximum-width-of-binary-tree/discuss/1482200/pythonpython3-maximum-width-of-binary-tree)\n[695. Max Area of Island](https://leetcode.com/problems/max-area-of-island/discuss/1245909/pythonpython3-max-area-of-island-bfs)\n[700. Search in a Binary Search Tree](https://leetcode.com/problems/search-in-a-binary-search-tree/discuss/688409/PythonPython3-Search-in-a-Binary-Search-Tree)\n[733. Flood Fill](https://leetcode.com/problems/flood-fill/discuss/1246017/pythonpython3-flood-fill-bfs)\n[747. Largest Number At Least Twice of Others](https://leetcode.com/problems/largest-number-at-least-twice-of-others/discuss/1036570/PythonPython3-or-One-liner-and-Detailed-or-Largest-Number-At-Least-Twice-of-Others)\n[792. Number of Matching Subsequences](https://leetcode.com/problems/number-of-matching-subsequences/discuss/1103585/PythonPython3-Number-of-Matching-Subsequences)\n[821. Shortest Distance to a Character](https://leetcode.com/problems/shortest-distance-to-a-character/discuss/1057046/PythonPython3-Shortest-Distance-to-a-Character)\n[833. Find And Replace in String](https://leetcode.com/problems/find-and-replace-in-string/discuss/1490050/pythonpython3-find-and-replace-in-string)\n[844. Backspace String Compare](https://leetcode.com/problems/backspace-string-compare/discuss/1481955/pythonpython3-backspace-string-compare)\n[848. Shifting Letters](https://leetcode.com/problems/shifting-letters/discuss/1088920/PythonPython3-Shifting-Letter-or-2-Solutions-or-One-liner)\n[890. Find and Replace Pattern](https://leetcode.com/problems/find-and-replace-pattern/discuss/1100914/PythonPython3-Find-and-Replace-Pattern)\n[931. Minimum Falling Path Sum](https://leetcode.com/problems/minimum-falling-path-sum/discuss/1455076/PythonPython3-Minimum-Falling-Path-Sum)\n[941. Valid Mountain Array](https://leetcode.com/problems/valid-mountain-array/discuss/1050492/PythonPython3-Valid-Mountain-Array)\n[973. K Closest Points to Origin](https://leetcode.com/problems/k-closest-points-to-origin/discuss/1048732/PythonPython3-or-K-Closest-Points-to-Origin-or-One-Liner)\n[980. Unique Paths III](https://leetcode.com/problems/unique-paths-iii/discuss/1418479/PythonPython3-Unique-Paths-III)\n[988. Smallest String Starting From Leaf](https://leetcode.com/problems/smallest-string-starting-from-leaf/discuss/1190197/PythonPython3-Smallest-String-Starting-From-Leaf)\n[1048. Longest String Chain](https://leetcode.com/problems/longest-string-chain/discuss/1512077/PythonPython3-Longest-String-Chain)\n[1022. Sum of Root To Leaf Binary Numbers](https://leetcode.com/problems/sum-of-root-to-leaf-binary-numbers/discuss/1191997/PythonPython3-Sum-of-Root-To-Leaf-Binary-Numbers)\n[1041. Robot Bounded In Circle](https://leetcode.com/problems/robot-bounded-in-circle/discuss/1225502/pythonpython3-robot-bounded-in-circle)\n[1161. Maximum Level Sum of a Binary Tree](https://leetcode.com/problems/maximum-level-sum-of-a-binary-tree/discuss/1293713/PythonPython3-Maximum-Level-Sum-of-a-Binary-Tree)\n[1229. Meeting Scheduler](https://leetcode.com/problems/meeting-scheduler/discuss/1547919/PythonPython3-Meeting-Scheduler)\n[1245. Tree Diameter](https://leetcode.com/problems/tree-diameter/solutions/4791626/python-python3-tree-diameter/)\n[1249. Minimum Remove to Make Valid Parentheses](https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses/discuss/1073817/PythonPython3-Minimum-Remove-to-Make-Valid-Parentheses)\n[1290. Convert Binary Number in a Linked List to Integer](https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/discuss/1204052/PythonPython3-Convert-Binary-Number-in-a-Linked-List-to-Integer)\n[1295. Find Numbers with Even Number of Digits](https://leetcode.com/problems/find-numbers-with-even-number-of-digits/discuss/1047209/PythonPython3-or-One-liner-or-Map-or-Find-Numbers-with-Even-Number-of-Digits)\n[1299. Replace Elements with Greatest Element on Right Side](https://leetcode.com/problems/replace-elements-with-greatest-element-on-right-side/discuss/1204090/PythonPython3-Replace-Elements-with-Greatest-Element-on-Right-Side)\n[1305. All Elements in Two Binary Search Trees](https://leetcode.com/problems/all-elements-in-two-binary-search-trees/discuss/1481721/pythonpython3-all-elements-in-two-binary-search-trees)\n[1315. Sum of Nodes with Even-Valued Grandparent](https://leetcode.com/problems/sum-of-nodes-with-even-valued-grandparent/discuss/679138/PythonPython3-Sum-of-Nodes-with-Even-Valued-Grandparent)\n[1337. The K Weakest Rows in a Matrix](https://leetcode.com/problems/the-k-weakest-rows-in-a-matrix/discuss/1067966/PythonPython3-The-K-Weakest-Rows-in-a-Matrix)\n[1470. Shuffle the Array](https://leetcode.com/problems/shuffle-the-array/discuss/674406/pythonpython3-shuffle-the-array)\n[1492. The kth Factor of n](https://leetcode.com/problems/the-kth-factor-of-n/discuss/708262/pythonpython3-the-kth-factor-of-n)\n[1496. Path Crossing](https://leetcode.com/problems/path-crossing/discuss/709274/pythonpython3-path-crossing)\n[1503. Last Moment Before All Ants Fall Out of a Plank](https://leetcode.com/problems/last-moment-before-all-ants-fall-out-of-a-plank/discuss/720202/pythonpython3-last-moment-before-all-ants-fall-out-of-a-plank)\n[1512. Number of Good Pairs](https://leetcode.com/problems/number-of-good-pairs/discuss/731670/pythonpython3-number-of-good-pairs)\n[1513. Number of Substrings With Only 1s](https://leetcode.com/problems/number-of-substrings-with-only-1s/discuss/731641/pythonpython3-number-of-substrings-with-only-1s)\n[1518. Water Bottles](https://leetcode.com/problems/water-bottles/discuss/743144/pythonpython3-water-bottles)\n[1525. Number of Good Ways to Split a String](https://leetcode.com/problems/number-of-good-ways-to-split-a-string/discuss/1489939/pythonpython3-number-of-good-ways-to-split-a-string)\n[1528. Shuffle String](https://leetcode.com/problems/shuffle-string/discuss/832653/pythonpython3-shuffle-string)\n[1609. Even Odd Tree](https://leetcode.com/problems/even-odd-tree/discuss/1442025/pythonpython3-even-odd-tree)\n[1706. Where Will the Ball Fall](https://leetcode.com/problems/where-will-the-ball-fall/discuss/1482102/PythonPython3-Where-will-the-Ball-Fall)\n[1758. Minimum Changes To Make Alternating Binary String](https://leetcode.com/problems/minimum-changes-to-make-alternating-binary-string/discuss/1064504/pythonpython3-minimum-changes-to-make-alternating-binary-string)\n[1868. Product of Two Run-Length Encoded Arrays](https://leetcode.com/problems/product-of-two-run-length-encoded-arrays/discuss/1547865/PythonPython3-Product-of-Two-run-Length-Encoded-Arrays)

I \' ll keep editing this post with the posts that I write in the discuss section of different questions.\nAlso, will post link to this post in my each dicuss p