DSA Practice – LeetCode (Python)

This repository contains my solutions to Data Structures & Algorithms (DSA) problems from LeetCode, implemented in Python.

📘 Handbook: LEET Handbook.pdf

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📊 Progress

Problems Solved: 87 ✅
(Continuously updating)

📘 Explained Solutions

• 👉 Explained Solutions (PDF)

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✅ Problems Solved

🔹 Arrays and Strings

• 1. Two Sum 👉 View Solution

• 217. Contains Duplicate 👉 View Solution

• 242. Valid Anagram 👉 View Solution

• 268. Missing Number 👉 View Solution

• 350. Intersection of Two Arrays II 👉 View Solution

• 66. Plus One 👉 View Solution

• 3. Longest Substring Without Repeating Characters 👉 View Solution

• 122. Best Time to Buy and Sell Stock II 👉 View Solution

• 128. Longest Consecutive Sequence 👉 View Solution

• 121. Best Time to Buy and Sell Stock 👉 View Solution

• 238. Product of Array Except Self 👉 View Solution

• 53. Maximum Subarray 👉 View Solution

• 724. Find Pivot Index 👉 View Solution

• 125. Valid Palindrome 👉 View Solution

• 344. Reverse String 👉 View Solution

• 26. Remove Duplicates from Sorted Array 👉 View Solution

• 283. Move Zeroes 👉 View Solution

• 11. Container With Most Water 👉 View Solution

• 42. Trapping Rain Water 👉 View Solution

• 27. Remove Element 👉 View Solution

• 977. Squares of a Sorted Array 👉 View Solution

• 169. Majority Element 👉 View Solution

• 189. Rotate Array 👉 View Solution

• 438. Find All Anagrams in a String 👉 View Solution

• 567. Permutation in String 👉 View Solution

• 704. Binary Search 👉 View Solution

• 35. Search Insert Position 👉 View Solution

• 34. Find First and Last Position of Element in Sorted Array 👉 View Solution

• 151. Reverse Words In A String 👉 View Solution

• 162. Find Peak Element 👉 View Solution

• 69. Sqrt(x) 👉 View Solution

• 367. Valid Perfect Square 👉 View Solution

• 153: Find Minimum in Rotated Sorted Array 👉 View Solution

• 33: Search in Rotated Sorted Array 👉 View Solution

• 1295: Find Numbers with Even Number of Digits 👉 View Solution

• 58: Length of Last Word 👉 View Solution

• 12: Integer to Roman 👉 View Solution

• 14: Longest Common Prefix 👉 View Solution

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🔹 Stack

• 20: Valid Parentheses 👉 View Solution

• 1047: Remove All Adjacent Duplicates in String 👉 View Solution

• 682: Baseball Game 👉 View Solution

• 155: Min Stack 👉 View Solution

• 496: Next Greater Element I 👉 View Solution

• 739: Daily Temperatures 👉 View Solution

• 844: Backspace String Compare 👉 View Solution

• 150: Evaluate Reverse Polish Notation 👉 View Solution

• 1544: Make The String Great 👉 View Solution

• 232: Implement Queue using Stacks 👉 View Solution

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🔹 Linked List

• 206: Reverse Linked List 👉 View Solution

• 876: Middle of the Linked List 👉 View Solution

• 141: Linked List Cycle 👉 View Solution

• 234: Palindrome Linked List 👉 View Solution

• 21: Merge Two Sorted Lists 👉 View Solution

• 19: Remove Nth Node From End of List 👉 View Solution

• 83: Remove Duplicates from Sorted List 👉 View Solution

• 160: Intersection of Two Linked Lists 👉 View Solution

• 203: Remove Linked List Elements 👉 View Solution

• 2: Add 2 Numbers 👉 View Solution

• 92: Reverse Linked List II 👉 View Solution

• 143: Reorder List 👉 View Solution

• 328: Odd Even Linked List 👉 View Solution

• 24: Swap Nodes in Pairs 👉 View Solution

• 237: Delete Node in a Linked List 👉 View Solution

• 1290: Convert Binary Number in a Linked List to Integer 👉 View Solution

• 61: Rotate List 👉 View Solution

• 1721: Swapping Nodes in a Linked List 👉 View Solution

• 86: Partition List 👉 View Solution

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🔹 Dynamic Programming

• 70: Climbing Stairs 👉 View Solution

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🔹 Trees

• 104 : Maximum Depth Of Binary Tree 👉 View Solution

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🔹 Feb Daily Coding Questions

• 67: Add Binary 👉 View Solution

• 190: Reverse Bits 👉 View Solution

• 401: Binary Watch 👉 View Solution

• 693: Binary Number with Alternating Bits 👉 View Solution

• 696: Count Binary Substrings 👉 View Solution

• 762: Prime Number of Set Bits in Binary Representation 👉 View Solution

• 868: Binary Gap 👉 View Solution

• 1461: Check If a String Contains All Binary Codes of Size K 👉 View Solution

• 1356: Sort Integers by The Number of 1 Bits 👉 View Solution

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🔹 DSA Quest

• 485: Max Consecutive Ones 👉 View Solution

• 1441: Build an Array With Stack Operations 👉 View Solution

• 1470: Shuffle the Array 👉 View Solution

• How Many Numbers Are Smaller Than the Current Number 👉 View Solution

• Set Mismatch 👉 View Solution

• Exclusive Time of Functions 👉 View Solution

• 1929: Concatenation of Array 👉 View Solution

• Evaluate Reverse Polish Notation 👉 View Solution

• Final Prices With a Special Discount in a Shop 👉 View Solution

• Daily Temperatures 👉 View Solution

🧠 Notes

• Focus is on clean logic and optimal solutions
• Problems are solved with attention to time and space complexity
• This repository will be updated regularly as I progress further in DSA