LeetCode-Solutions-Java

This repository contains my personal Java solutions to LeetCode problems.
I'm solving DSA consistently and using this repo to organize my logic cleanly and track my progress.

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Problems Solved So Far

Easy

#	Title	Java File
1	Two Sum	P1_TwoSum.java
2	Missing Number	P268_MissingNumber.java
3	Running Sum of 1D Array	P1480_RunningSum1D.java
4	Richest Customer Wealth	P1672_MaxWealth2D.java
5	FizzBuzz	P412_FizzBuzz.java
6	Reduce Number to Zero	P1342_ReduceToZero.java
7	Valid Anagram	P242_ValidAnagram.java
8	Ransom Note	P383_RansomNote.java

Medium

#	Title	Java File
1	Group Anagrams	P49_GroupAnagrams.java
2	Top K Frequent Elements	P347_TopKFrequent.java
3	Find All Anagrams in a String	P438_FindAllAnagrams.java
4	Longest Substring Without Repeating Characters	P3_LongestSubStringWithoutRepeat.java
5	Remove Duplicates from Sorted Array II	P80_RemoveDuplicateII.java

Brute-Force Practice (Easy)

Note: This is where I focus on pure logic building first — not optimization.

Title	Java File
Two Sum	P1_TwoSum.java
Search Insert Position	P35_SearchInsertPosition.java
Find the Difference	P389_FindTheDifference.java
Maximum Profit	P121_MaxiumProfit.java
Contains Duplicate	P217_ContainsDuplicate.java
Single Number	P136_SingleNumber.java
Pascal’s Triangle	P118_PascalsTriangle.java
Maximum Number of Balloons	P1189_MaximumNumberBalloons.java
Find Numbers with Even Digits	P1295_FindNumbersWithEvenNumberDigits.java
Numbers Smaller Than Current Number	P1365_NumbersSmallerThanCurrentNumber.java
Create Target Array	P1389_CreateTargetArray.java
Highest Candies	P1431_HighestCandies.java
Destination City	P1436_DestinationCity.java
Check if All 1s at K Distance	P1437_CheckIfAll1LeastLengthKPlacesAway.java
Students Doing Homework	P1450_NumberOfStudentsDoingHomework.java
Shuffle the Array	P1470_ShuffletheArray.java
Running Sum of 1D Array	P1480_RunningSum1DArray.java
Majority Element	P169_majorityElement.java
Max Product of Three Numbers	P628_MaxProductOfThree.java
To Lower Case	P709_ToLowerCaseExample.java

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Tools I Use

• Java (IntelliJ IDEA)
• GitHub
• LeetCode (Daily Practice)

Goals

• Solve 100+ LeetCode problems
• Write clean, optimized code
• Grow DSA + backend skills consistently