Problem-Solving-Python

LeetCode Solutions

Welcome to my LeetCode solutions repository! This repository contains my solutions to various LeetCode problems, categorized by difficulty level. Each solution is written in Python and includes a link to the corresponding LeetCode problem.

Table of Contents

• Introduction
• How to Use
• Solutions
  • Easy
  • Medium
  • Hard
• Contact

Introduction

This repository is a collection of my solutions to LeetCode problems. I have organized the solutions by difficulty level and provided the source code along with the link to the problem.

How to Use

1. Navigate to the folder corresponding to the difficulty level you are interested in (e.g., Easy, Medium, Hard).
2. Find the solution by the problem name or number.
3. Open the corresponding Python file to view the solution.

Solutions

Easy

Problem Link	Solution	Difficulty
Valid Palindrome	Solution	Easy
Two Sum	Solution	Easy
Palindrome Number	Solution	Easy
Remove Duplicates from Sorted Array	Solution	Easy
Find the Index of the First Occurrence in a String	Solution	Easy
Search Insert Position	Solution	Easy
Length of Last Word	Solution	Easy
Plus One	Solution	Easy
Sqrt(x)	Solution	Easy
Climbing Stairs	Solution	Easy
Merge Sorted Array	Solution	Easy
Single Number	Solution	Easy
Summary Ranges	Solution	Easy
Ugly Number	Solution	Easy
Majority Element	Solution	Easy
Happy Number	Solution	Easy
Add Digits	Solution	Easy
Valid Anagram	Solution	Easy
Missing Number	Solution	Easy
Move Zeroes	Solution	Easy
Word Pattern	Solution	Easy
Nim Game	Solution	Easy
Reverse String	Solution	Easy
Reverse Vowels of a String	Solution	Easy
Counting Bits	Solution	Easy
Intersection of Two Arrays	Solution	Easy
First Unique Character in a String	Solution	Easy
Find the Difference	Solution	Easy
Ransom Note	Solution	Easy
Is Subsequence	Solution	Easy
Longest Palindrome	Solution	Easy
Fizz Buzz	Solution	Easy
Third Maximum Number	Solution	Easy
Number of Segments in a String	Solution	Easy
Arranging Coins	Solution	Easy
Find All Numbers Disappeared in an Array	Solution	Easy
Assign Cookies	Solution	Easy
Repeated Substring Pattern	Solution	Easy
Hamming Distance	Solution	Easy
Number Complement	Solution	Easy
License Key Formatting	Solution	Easy
Max Consecutive Ones	Solution	Easy
Next Greater Element I	Solution	Easy
Keyboard Row	Solution	Easy
Base 7	Solution	Easy
Relative Ranks	Solution	Easy
Longest Uncommon Subsequence I	Solution	Easy
Detect Capital	Solution	Easy
Reverse String II	Solution	Easy
Reverse Words in a String III	Solution	Easy
Array Partition	Solution	Easy
Distribute Candies	Solution	Easy
Longest Harmonious Subsequence	Solution	Easy
Can Place Flowers	Solution	Easy
Minimum Index Sum of Two Lists	Solution	Easy
Set Mismatch	Solution	Easy
Maximum Average Subarray I	Solution	Easy
Robot Return to Origin	Solution	Easy
Baseball Game	Solution	Easy
Binary Number with Alternating Bits	Solution	Easy
Count Binary Substrings	Solution	Easy
To Lower Case	Solution	Easy
Self Dividing Numbers	Solution	Easy
Largest Number At Least Twice of Others	Solution	Easy
Shortest Completing Word	Solution	Easy
Longest Continuous Increasing Subsequence	Solution	Easy
Prime Number of Set Bits in Binary Representation	Solution	Easy
Jewels and Stones	Solution	Easy
Rotate String	Solution	Easy
Unique Morse Code Words	Solution	Easy
Number of Lines to Write String	Solution	Easy
Most Common Word	Solution	Easy
Shortest Distance to a Character	Solution	Easy
Goat Latin	Solution	Easy
Positions of Large Groups	Solution	Easy
Flipping an Image	Solution	Easy
Backspace String Compare	Solution	Easy
Buddy Strings	Solution	Easy
Lemonade Change	Solution	Easy
Transpose Matrix	Solution	Easy
Binary Gap	Solution	Easy
Uncommon Words from Two Sentences	Solution	Easy
Optimal Partition of String	Solution	Easy
The K-th Factor of N	Solution	Easy
Monotonic Array	Solution	Easy
Reverse Only Letters	Solution	Easy
Sort Array by Parity II	Solution	Easy
Unique Email Addresses	Solution	Easy
Long Pressed Name	Solution	Easy
Number of Recent Calls	Solution	Easy
Valid Mountain Array	Solution	Easy
DI String Match	Solution	Easy
Delete Columns to Make Sorted	Solution	Easy
N-Repeated Element in Size 2N Array	Solution	Easy
Squares of a Sorted Array	Solution	Easy
Find the Town Judge	Solution	Easy
Find Common Characters	Solution	Easy
Maximize Sum of Array After K Negations	Solution	Easy
Complement of Base 10 Integer	Solution	Easy
Divisor Game	Solution	Easy
Binary Prefix Divisible by 5	Solution	Easy
Remove Outermost Parentheses	Solution	Easy
Partition Array Into Three Parts With Equal Sum	Solution	Easy
Remove All Adjacent Duplicates In String	Solution	Easy
Maximum Number of Balloons	Solution	Easy
Relative Sort Array	Solution	Easy
Height Checker	Solution	Easy
Occurrences After Bigram	Solution	Easy
Duplicate Zeros	Solution	Easy
Distribute Candies to People	Solution	Easy
Defanging an IP Address	Solution	Easy
Number of Equivalent Domino Pairs	Solution	Easy
Minimum Absolute Difference	Solution	Easy
N-th Tribonacci Number	Solution	Easy
Day of the Year	Solution	Easy
Find Words That Can Be Formed by Characters	Solution	Easy
Unique Number of Occurrences	Solution	Easy
Split a String in Balanced Strings	Solution	Easy
Find Numbers with Even Number of Digits	Solution	Easy
Replace Elements with Greatest Element on Right Side	Solution	Easy
Find N Unique Integers Sum up to Zero	Solution	Easy
Find Lucky Integer in an Array	Solution	Easy
Decrypt String from Alphabet to Integer Mapping	Solution	Easy
Decompress Run-Length Encoded List	Solution	Easy
Convert Integer to the Sum of Two No-Zero Integers	Solution	Easy
Maximum 69 Number	Solution	Easy
Rank Transform of an Array	Solution	Easy
The K Weakest Rows in a Matrix	Solution	Easy
Number of Steps to Reduce a Number to Zero	Solution	Easy
Check If N and Its Double Exist	Solution	Easy
Count Negative Numbers in a Sorted Matrix	Solution	Easy
Sort Integers by The Number of 1 Bits	Solution	Easy
How Many Numbers Are Smaller than the Current Number	Solution	Easy
Increasing Decreasing String	Solution	Easy
Generate a String With Characters That Have Odd Counts	Solution	Easy
Lucky Numbers in a Matrix	Solution	Easy
Number of 1 Bits	Solution	Easy
Linked List Cycle	Solution	Easy
Remove Linked List Elements	Solution	Easy
Middle of the Linked List	Solution	Easy
Remove Duplicates from Sorted List	Solution	Easy
Power of Three	Solution	Easy
Reverse Linked List	Solution	Easy
Fibonacci Number	Solution	Easy
Maximum Score After Splitting a String	Solution	Easy
String Matching in an Array	Solution	Easy
Contains Duplicate II	Solution	Easy
Find the K-Beauty of a Number	Solution	Easy
Minimum Recolors to Get K Consecutive Black Blocks	Solution	Easy
Defuse the Bomb	Solution	Easy
Check If Two Chessboard Squares Have the Same Color	Solution	Easy
Kids With the Greatest Number of Candies	Solution	Easy
Check if All 1's Are at Least Length K Places Away	Solution	Easy
Consecutive Characters	Solution	Easy
Check If a Word Occurs as a Prefix of Any Word in a Sentence	Solution	Easy
Make Two Arrays Equal by Reversing Subarrays	Solution	Easy
Maximum Product of Two Elements in an Array	Solution	Easy
Shuffle the Array	Solution	Easy
XOR Operation in an Array	Solution	Easy
Sort Array by Parity	Solution	Easy
Create Target Array in the Given Order	Solution	Easy
Minimum Subsequence in Non-Increasing Order	Solution	Easy
Intersection of Two Linked Lists	Solution	Easy
Minimum Bit Flips to Convert Number	Solution	Easy
Count the Number of Consistent Strings	Solution	Easy
Reformat Date	Solution	Easy
Kth Largest Element in a Stream	Solution	Easy
Binary Tree Inorder Traversal	Solution	Easy
Path Sum	Solution	Easy
Binary Tree Preorder Traversal	Solution	Easy
Binary Tree Postorder Traversal	Solution	Easy
Count Complete Tree Nodes	Solution	Easy
Same Tree	Solution	Easy
Rank Transform of an Array	Solution	Easy

Medium

Problem Link	Solution	Difficulty
Longest Palindromic Substring	Solution	Medium
String to Integer (atoi)	Solution	Medium
Container With Most Water	Solution	Medium
Divide Two Integers	Solution	Medium
3Sum	Solution	Medium
Find First and Last Position of Element in Sorted Array	Solution	Medium
4Sum	Solution	Medium
3Sum Closest	Solution	Medium
Remove Nth Node From End of List	Solution	Medium
Multiply Strings	Solution	Medium
Remove Duplicates from Sorted Array II	Solution	Medium
Delete Node in a Linked List	Solution	Medium
Permutations	Solution	Medium
Subsets	Solution	Medium
Delete Nodes from Linked List Present in Array	Solution	Medium
Remove Duplicates from Sorted List II	Solution	Medium
Partition List	Solution	Medium
Subsets II	Solution	Medium
Insert Greatest Common Divisors in Linked List	Solution	Medium
Single Number II	Solution	Medium
Linked List Cycle II	Solution	Medium
Insertion Sort List	Solution	Medium
Reverse Words in a String	Solution	Medium
Min Stack	Solution	Medium
Find Peak Element	Solution	Medium
XOR Queries of a Subarray	Solution	Medium
Longest Subarray with Maximum Bitwise AND	Solution	Medium
Maximum Gap	Solution	Medium
Compare Version Numbers	Solution	Medium
Two Sum II (Input Array Is Sorted)	Solution	Medium
Rotate Array	Solution	Medium
Largest Number	Solution	Medium
Smallest Value of the Rearranged Number	Solution	Medium
Kth Largest Element in an Array	Solution	Medium
Lexicographical Numbers	Solution	Medium
Maximum Product Subarray	Solution	Medium
Factorial Trailing Zeroes	Solution	Medium
Find the Length of the Longest Common Prefix	Solution	Medium
My Calendar I	Solution	Medium
Add Two Numbers	Solution	Medium
Design Circular Deque	Solution	Medium
Sum Root to Leaf Numbers	Solution	Medium
Check if Array Pairs Are Divisible by K	Solution	Medium
Binary Tree Right Side View	Solution	Medium

Hard

Contact

If you have any questions or suggestions, feel free to reach out to me at niteesh.bv@gmail.com.