My-LeetCode-Solutions

A portfolio of my LeetCode solutions as well as solutions from other sites. Will continually update as I solve problems. You can find a link to my LeetCode profile here.

Problem Link to LeetCode	Difficulty	Solution Language(s)
Add Two Integers	Easy	Python
Rotate String	Easy	Python
Delete Columns to Make Sorted	Easy	Python
Neither Minimum Nor Maximum	Easy	Python
Flipping an Image	Easy	Python
Find First Palindromic String in the Array	Easy	Python
Number of Unique Subjects Taught by Each Teacher	Easy	Python
Reverse Prefix of Word	Easy	Python
Cells in a Range on an Excel Sheet	Easy	Python
Remove Trailing Zeros From a String	Easy	Python
Find Words Containing Character	Easy	Python
Check if a String Is an Acronym of Words	Easy	Python
Permutation Difference between Two Strings	Easy	Python
Smallest Even Multiple	Easy	Python
Modify Columns	Easy	Python
Sort the People	Easy	Python
Counting Bits	Easy	Python
Find the XOR of Numbers Which Appear Twice	Easy	Python
Alternating Digit Sum	Easy	Python
Customers Who Never Order	Easy	Python
Minimum Number Game	Easy	Python
Maximum Number of Words Found in Sentences	Easy	Python
Merge Similar Items	Easy	Python
Check If a Number Is Majority Element in a Sorted Array	Easy	Python
Merge Sorted Array	Easy	Python
Number of Senior Citizens	Easy	Python
Bitwise OR of Adjacent Elements	Easy	Python
Divisible and Non-divisible Sums Difference	Easy	Python
Display the First Three Rows	Easy	Python
Richest Customer Wealth	Easy	Python
Count Items Matching a Rule	Easy	Python
Sign of the Product of an Array	Easy	Python
Add Binary	Easy	Python
Goal Parser Interpretation	Easy	Python
Find Maximum Number of String Pairs	Easy	Python
Remove Element	Easy	Python
Greatest English Letter in Upper and Lower Case	Easy	Python
Contains Duplicate	Easy	Python
Word Pattern	Easy	Python
Build Array from Permutation	Easy	Python
Running Sum of 1d Array	Easy	Python
Check if the Sentence Is Pangram	Easy	Python
Find the Array Concatenation Value	Easy	Python
Percentage of Letter in String	Easy	Python
Sorting the Sentence	Easy	Python
String Matching in an Array	Easy	Python
Check If Two String Arrays are Equivalent	Easy	Python
Kids With the Greatest Number of Candies	Easy	Python
Concatenation of Array	Easy	Python
Final Value of Variable After Performing Operations	Easy	Python
Shuffle the Array	Easy	Python
Convert the Temperature	Easy	Python
Number of Good Pairs	Easy	Python
Largest Unique Number	Easy	Python
Count the Digits That Divide a Number	Easy	Python
Defanging an IP Address	Easy	Python
Jewels and Stones	Easy	Python
Number of Steps to Reduce a Number to 0	Easy	Python
Shuffle String	Easy	Python
Subtract the Product and Sum of Digits of an Integer	Easy	Python
Decompress Run-Length Encoded List	Easy	Python
XOR Operation in an Array	Easy	Python
Create Target Array in the Given Order	Easy	Python
Find Numbers with Even Number of Digits	Easy	Python
Convert Binary Number in a Linked List to Integer	Easy	Python
To Lower Case	Easy	Python
Number of Students Doing Homework at a Given Time	Easy	Python
Maximum Product of Two Elements in an Array	Easy	Python
Maximum 69 Number	Easy	Python
Change Data Type	Easy	Python
Unique Morse Code Words	Easy	Python
Merge Strings Alternately	Easy	Python
Reverse Vowels of a String	Easy	Python
Count Negative Numbers in a Sorted Matrix	Easy	Python
Sort Array By Parity	Easy	Python
Robot Return to Origin	Easy	Python
Find Target Indices After Sorting Array	Easy	Python
Can Make Arithmetic Progression From Sequence	Easy	Python
Squares of a Sorted Array	Easy	Python
Array Partition I	Easy	Python
Minimum Operations to Exceed Threshold Value I	Easy	Python
Unique Number of Occurrences	Easy	Python
Peak Index in a Mountain Array	Easy	Python
Height Checker	Easy	Python
Average Salary Excluding the Minimum and Maximum Salary	Easy	Python
Reverse Words in a String III	Easy	Python
Reverse String	Easy	Python
Minimum Absolute Difference	Easy	Python
Count the Number of Consistent Strings	Easy	Python
Single Number	Easy	Python
Number Complement	Easy	Python
Find Lucky Integer in an Array	Easy	Python
Uncommon Words from Two Sentences	Easy	Python
Intersection of Two Arrays	Easy	Python
Intersection of Two Arrays II	Easy	Python
Fizz Buzz	Easy	Python
Maximum Score After Splitting a String	Easy	Python
Find the Index of the First Occurrence in a String	Easy	Python
Find the Maximum Achievable Number	Easy	Python
Element Appearing More Than 25% In Sorted Array	Easy	Python
Complement of Base 10 Integer	Easy	Python
Binary Number with Alternating Bits	Easy	Python
Majority Element	Easy	Python
Check if Numbers Are Ascending in a Sentence	Easy	Python
Monotonic Array	Easy	Python
Minimum Average of Smallest and Largest Elements	Easy	Python
N-Repeated Element in Size 2N Array	Easy	Python
Move Zeroes	Easy	Python
Find Common Elements Between Two Arrays	Easy	Python
Count Pairs Whose Sum is Less than Target	Easy	Python
Find the Difference of Two Arrays	Easy	Python
Intersection of Three Sorted Arrays	Easy	Python
Add Digits	Easy	Python
Fibonacci Number	Easy	Python
Keyboard Row	Easy	Python
Truncate Sentence	Easy	Python
Number of 1 Bits	Easy	Python
Remove Letter To Equalize Frequency	Easy	Python
Detect Capital	Easy	Python
Check if The Number is Fascinating	Easy	Python
Roman to Integer	Easy	Python
Row With Maximum Ones	Easy	Python
Palindrome Number	Easy	Python
Power of Two	Easy	Python
Two Out of Three	Easy	Python
Two Sum	Easy	Python
Count Elements With Maximum Frequency	Easy	Python
Plus One	Easy	Python
Decode the Message	Easy	Python
Find the Sum of Encrypted Integers	Easy	Python
Separate the Digits in an Array	Easy	Python
Power of Three	Easy	Python
Check if All Characters Have Equal Number of Occurrences	Easy	Python
Sum of Unique Elements	Easy	Python
Sum of Digits in the Minimum Number	Easy	Python
Sum Multiples	Easy	Python
Valid Perfect Square	Easy	Python
Valid Parentheses	Easy	Python
Power of Four	Easy	Python
Count the Number of Vowel Strings in Range	Easy	Python
High Five	Easy	Python
A Number After a Double Reversal	Easy	Python
Implement strStr()	Easy	Python
Sqrt(x)	Easy	Python
Count Numbers With Unique Digits II	Easy	Python
Split Strings by Separator	Easy	Python
Remove Vowels from a String	Easy	Python
Length of Last Word	Easy	Python
Third Maximum Number	Easy	Python
First Letter to Appear Twice	Easy	Python
Single-Row Keyboard	Easy	Python
Reverse Integer	Easy	Python
Count the Number of Special Characters I	Easy	Python
Difference Between Element Sum and Digit Sum of an Array	Easy	Python
Count Number of Distinct Integers After Reverse Operations	Medium	Python
Permutations	Medium	Python
Multiply Strings	Medium	Python
Letter Combinations of a Phone Number	Medium	Python
Rearrange Array Elements by Sign	Medium	Python
Find All Duplicates in an Array	Medium	Python
Reverse Words in a String	Medium	Python
Reshape Data: Concatenate	Easy	pandas
Reshape Data: Melt	Easy	pandas
Reshape Data: Pivot	Easy	pandas
Rename Columns	Easy	pandas
Method Chaining	Easy	pandas
Select Data	Easy	pandas
Sort Array by Increasing Frequency	Easy	pandas
Warehouse Manager	Easy	pandas
Get the Size of a DataFrame	Easy	pandas
Reported Posts	Easy	pandas
Find Cities in Each State	Easy	pandas
Create a DataFrame from List	Easy	pandas
Premier League Table Ranking	Easy	pandas
Find the Team Size	Easy	pandas
Find Total Time Spent by Each Employee	Easy	pandas
Recyclable and Low Fat Products	Easy	pandas
Drop Duplicate Rows	Easy	pandas
Drop Missing Data	Easy	pandas
Fill Missing Data	Easy	pandas
Count Artist Occurrences On Spotify Ranking List	Easy	pandas
Invalid Tweets	Easy	pandas
Invalid Tweets II	Easy	pandas
List the Products Ordered in a Period	Easy	pandas
Bikes Last Time Used	Easy	pandas
Unique Orders and Customers Per Month	Easy	pandas
Employees Earning More Than Their Managers	Easy	pandas
Delete Duplicate Emails	Easy	pandas
NPV Queries	Easy	pandas
Product Sales Analysis I	Easy	pandas
Find Expensive Cities	Easy	pandas
Sellers With No Sales	Easy	pandas
Duplicate Emails	Easy	pandas
Rearrange Products Table	Easy	pandas
The Latest Login in 2020	Easy	pandas
Not Boring Movies	Easy	pandas
Game Play Analysis I	Easy	pandas
Low-Quality Problems	Easy	pandas
Article Views I	Easy	pandas
Sales Analysis I	Easy	pandas
Sales Analysis II	Easy	pandas
Combine Two Tables	Easy	pandas
Find Candidates for Data Scientist Position	Easy	pandas
Find Customer Referee	Easy	pandas
Product Sales Analysis II	Easy	pandas
Product's Price for Each Store	Easy	pandas
Product's Price for Each Store	Easy	pandas
Employee Bonus	Easy	pandas
Convert Date Format	Easy	pandas
Immediate Food Delivery I	Easy	pandas
Find Followers Count	Easy	pandas
Find Latest Salaries	Easy	pandas
Group Sold Products By The Date	Easy	pandas
Total Traveled Distance	Easy	pandas
Students with Invalid Departments	Easy	pandas
The Winner University	Easy	pandas
Sales Person	Easy	pandas
Check if All A's Appears Before All B's	Easy	pandas
Average Time of Process per Machine	Easy	pandas
Fix Names in a Table	Easy	pandas
Concatenate the Name and the Profession	Easy	pandas
All the Matches of the League	Easy	pandas
Bank Account Summary II	Easy	pandas
Calculate Compressed Mean	Easy	pandas
Second Day Verification	Easy	pandas
Biggest Single Number	Easy	pandas
Form a Chemical Bond	Easy	pandas
Highest Salaries Difference	Easy	pandas
Find Customers With Positive Revenue this Year	Easy	pandas
Class Performance	Medium	pandas
Second Highest Salary	Medium	pandas
Capital Gain/Loss	Medium	pandas
The Most Frequently Ordered Products for Each Customer	Medium	pandas
Grand Slam Titles	Medium	pandas
Rank Scores	Medium	pandas
Drop Type 1 Orders for Customers With Type 0 Orders	Medium	pandas
Employees With Missing Information	Medium	pandas
Running Total for Different Genders	Medium	pandas
Apples & Oranges	Medium	pandas
Department Highest Salary	Medium	pandas
Tasks Count in the Weekend	Medium	pandas
Manager of the Largest Department	Medium	pandas
Find the Missing IDs	Medium	pandas
Bitwise User Permissions Analysis	Medium	pandas
Department Top Three Salaries	Hard	pandas
Generate the Invoice	Hard	pandas
Status of Flight Tickets	Hard	pandas
Sales by Day of the Week	Hard	pandas
Big Countries	Easy	SQL
Swap Salary	Easy	SQL

Problem Link to HackerRank	Difficulty	Solution Language(s)
Say "Hello, World!"	Very Easy	C++, Python
Solve Me First	Very Easy	Golang, Python
A Very Big Sum	Very Easy	Python
Arithmetic Operators	Very Easy	Python
Python: Division	Very Easy	Python
Loops	Very Easy	Python
Mini-Max Sum	Very Easy	Python

Problem Link to Project Euler	Difficulty	Solution Language(s)
Multiples of 3 and 5	Easy	Python
Largest palindrome product	Easy	Python
Sum square difference	Easy	Python

Paradoxes	Solution Language(s)
St. Petersburg Paradox	Python