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Update README.md
Mar 25, 2025
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2-D Array
2-D Array
 
 
Binary Search
Binary Search
 
 
Cumulative_Sum(Prefix Array)
Cumulative_Sum(Prefix Array)
 
 
Difference Array Technique
Difference Array Technique
 
 
Intervals_Based_Qn
Intervals_Based_Qn
 
 
Leetcode Easy
Leetcode Easy
 
 
Simulation
Simulation
 
 
Two Pointer
Two Pointer
 
 
4Sum II
4Sum II
 
 
4Sum(kSum).cpp
4Sum(kSum).cpp
 
 
Arithmetic Subarrays.cpp
Arithmetic Subarrays.cpp
 
 
Array Nesting.cpp
Array Nesting.cpp
 
 
Array Pair Sum Divisibility Problem.cpp
Array Pair Sum Divisibility Problem.cpp
 
 
Beautiful_Arrangement_II.cpp
Beautiful_Arrangement_II.cpp
 
 
Best Sightseeing Pair.cpp
Best Sightseeing Pair.cpp
 
 
Can Place Flowers.cpp
Can Place Flowers.cpp
 
 
Contains Duplicate II.cpp
Contains Duplicate II.cpp
 
 
Count Number of Maximum Bitwise-OR Subsets.cpp
Count Number of Maximum Bitwise-OR Subsets.cpp
 
 
Count Number of Teams.cpp
Count Number of Teams.cpp
 
 
Count of Smaller Numbers After Self.cpp
Count of Smaller Numbers After Self.cpp
 
 
Divide Players Into Teams of Equal Skill.cpp
Divide Players Into Teams of Equal Skill.cpp
 
 
Element Appearing More Than 25% In Sorted Array.cpp
Element Appearing More Than 25% In Sorted Array.cpp
 
 
Factorials of large numbers.cpp
Factorials of large numbers.cpp
 
 
Fair Candy Swap.cpp
Fair Candy Swap.cpp
 
 
Find All Duplicates in an Array.cpp
Find All Duplicates in an Array.cpp
 
 
Find All Groups of Farmland.cpp
Find All Groups of Farmland.cpp
 
 
Find N Unique Integers Sum up to Zero
Find N Unique Integers Sum up to Zero
 
 
Find Original Array From Doubled Array.cpp
Find Original Array From Doubled Array.cpp
 
 
Find if Array Can Be Sorted.cpp
Find if Array Can Be Sorted.cpp
 
 
Find the Duplicate Number.cpp
Find the Duplicate Number.cpp
 
 
Find the Prefix Common Array of Two Arrays.cpp
Find the Prefix Common Array of Two Arrays.cpp
 
 
Find the Student that Will Replace the Chalk.cpp
Find the Student that Will Replace the Chalk.cpp
 
 
First Missing Positive.cpp
First Missing Positive.cpp
 
 
Group Anagrams.cpp
Group Anagrams.cpp
 
 
Group the People Given the Group Size They Belong To.cpp
Group the People Given the Group Size They Belong To.cpp
 
 
K closest elements
K closest elements
 
 
Kids With the Greatest Number of Candies.cpp
Kids With the Greatest Number of Candies.cpp
 
 
Largest Number.cpp
Largest Number.cpp
 
 
Largest Perimeter Triangle.cpp
Largest Perimeter Triangle.cpp
 
 
Longest Harmonious Subsequence.cpp
Longest Harmonious Subsequence.cpp
 
 
Longest Square Streak in an Array.cpp
Longest Square Streak in an Array.cpp
 
 
Longest Subarray With Maximum Bitwise AND.cpp
Longest Subarray With Maximum Bitwise AND.cpp
 
 
Longest subarray with sum divisible by K.cpp
Longest subarray with sum divisible by K.cpp
 
 
Majority Element (Moore's Voting).cpp
Majority Element (Moore's Voting).cpp
 
 
Majority Element II.cpp
Majority Element II.cpp
 
 
Make Lexicographically Smallest Array by Swapping Elements.cpp
Make Lexicographically Smallest Array by Swapping Elements.cpp
 
 
Max Chunks To Make Sorted II.cpp
Max Chunks To Make Sorted II.cpp
 
 
Max Chunks To Make Sorted.cpp
Max Chunks To Make Sorted.cpp
 
 
Max Consecutive Ones II.cpp
Max Consecutive Ones II.cpp
 
 
Max Sum of a Pair With Equal Sum of Digits.cpp
Max Sum of a Pair With Equal Sum of Digits.cpp
 
 
Maximum Size Subarray Sum Equals k
Maximum Size Subarray Sum Equals k
 
 
Maximum Sum Circular Subarray.cpp
Maximum Sum Circular Subarray.cpp
 
 
Maximum_Area_of_a_Piece_of Cake_After_Horizontal_and_Vertical_Cuts.cpp
Maximum_Area_of_a_Piece_of Cake_After_Horizontal_and_Vertical_Cuts.cpp
 
 
Maximum_Gap.cpp
Maximum_Gap.cpp
 
 
Maximum_Subarray.cpp
Maximum_Subarray.cpp
 
 
Minimum Difference Between Largest and Smallest Value in Three Moves.cpp
Minimum Difference Between Largest and Smallest Value in Three Moves.cpp
 
 
Minimum Increment to Make Array Unique.cpp
Minimum Increment to Make Array Unique.cpp
 
 
Minimum Lights to Activate.cpp
Minimum Lights to Activate.cpp
 
 
Minimum Number of Increments on Subarrays to Form a Target Array.cpp
Minimum Number of Increments on Subarrays to Form a Target Array.cpp
 
 
Minimum Number of K Consecutive Bit Flips.cpp
Minimum Number of K Consecutive Bit Flips.cpp
 
 
Minimum Number of Operations to Make Array Continuous..cpp
Minimum Number of Operations to Make Array Continuous..cpp
 
 
Minimum Operations to Make Array Equal to Target.cpp
Minimum Operations to Make Array Equal to Target.cpp
 
 
Minimum Time Difference.cpp
Minimum Time Difference.cpp
 
 
Monotonic Array.cpp
Monotonic Array.cpp
 
 
Next Permutation.cpp
Next Permutation.cpp
 
 
Non-decreasing_Array.cpp
Non-decreasing_Array.cpp
 
 
Number of Subarrays That Match a Pattern I and II.cpp
Number of Subarrays That Match a Pattern I and II.cpp
 
 
Number of Ways Where Square of Number Is Equal to Product of Two Numbers
Number of Ways Where Square of Number Is Equal to Product of Two Numbers
 
 
Number of Zero-Filled Subarrays.cpp
Number of Zero-Filled Subarrays.cpp
 
 
Pairs of Songs With Total Durations Divisible by 60
Pairs of Songs With Total Durations Divisible by 60
 
 
Pairs which are Divisible by 4
Pairs which are Divisible by 4
 
 
Pancake Sorting.cpp
Pancake Sorting.cpp
 
 
Partition Array According to Given Pivot.cpp
Partition Array According to Given Pivot.cpp
 
 
Partition Array into Disjoint Intervals.cpp
Partition Array into Disjoint Intervals.cpp
 
 
Pascal's Triangle II.cpp
Pascal's Triangle II.cpp
 
 
Pascal's Triangle.cpp
Pascal's Triangle.cpp
 
 
Prime Subtraction Operation.cpp
Prime Subtraction Operation.cpp
 
 
Product of Array Except Self.cpp
Product of Array Except Self.cpp
 
 
Product of the Last K Numbers.cpp
Product of the Last K Numbers.cpp
 
 
Put Marbles in Bags.cpp
Put Marbles in Bags.cpp
 
 
README.md
README.md
 
 
Rearrange Array Elements by Sign.cpp
Rearrange Array Elements by Sign.cpp
 
 
Reduction Operations to Make the Array Elements Equal.cpp
Reduction Operations to Make the Array Elements Equal.cpp
 
 
Rotating_an_Array.cpp
Rotating_an_Array.cpp
 
 
Row with minimum number of 1's
Row with minimum number of 1's
 
 
Sequential Digits.cpp
Sequential Digits.cpp
 
 
Set Mismatch.cpp
Set Mismatch.cpp
 
 
Shortest Unsorted Continuous Subarray
Shortest Unsorted Continuous Subarray
 
 
Snakes and Ladders.cpp
Snakes and Ladders.cpp
 
 
Sort Array By Parity.cpp
Sort Array By Parity.cpp
 
 
Sort Colors.cpp
Sort Colors.cpp
 
 
Sort an Array.cpp
Sort an Array.cpp
 
 
Subarray Sum Equals K (O(n)).cpp
Subarray Sum Equals K (O(n)).cpp
 
 
Subarray Sums Divisible by K .cpp
Subarray Sums Divisible by K .cpp
 
 
Sum of Absolute Differences in a Sorted Array.cpp
Sum of Absolute Differences in a Sorted Array.cpp
 
 
Sum of Even Numbers After Queries.cpp
Sum of Even Numbers After Queries.cpp
 
 
Summary Ranges.cpp
Summary Ranges.cpp
 
 
Swapping pairs make sum equal.cpp
Swapping pairs make sum equal.cpp
 
 
Three Equal Parts.cpp
Three Equal Parts.cpp
 
 
Transpose Matrix.cpp
Transpose Matrix.cpp
 
 
Trapping Rain Water (without stack).cpp
Trapping Rain Water (without stack).cpp
 
 
Tuple with Same Product.cpp
Tuple with Same Product.cpp
 
 
Two Sum.cpp
Two Sum.cpp
 
 
Widest Vertical Area Between Two Points Containing No Points.cpp
Widest Vertical Area Between Two Points Containing No Points.cpp
 
 
Wiggle Sort.cpp
Wiggle Sort.cpp
 
 

README.md

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Arrays : 🚩

🔽Click to 🔍 and 😵 the sub-topics (Example : Binary Search, Two Pointer etc.)

📁Intervals_Based_Qn

📁Difference Array Technique

📁2-D Array

📁Binary Search

📁Two Pointer

📁Cumulative_Sum(Prefix Array)

📁Simulation

📁Leetcode Easy

Questions

Problem Name
Two Sum (Leetcode - 1)
Largest Number / Largest Number formed from an Array (Leetcode-179 + GFG)
Rotating an Array (Leetcode-189)
Product of Array Except Self (Leetcode:238)
Group Anagrams(2 Approaches-Leetcode:49)
Find Minimum in Rotated Sorted Array II (Leetcode-154)
Subarray Sum Equals K (Leetcode-560)
Find All Duplicates in an Array (O(N)) (Leetcode-442)
Transpose Matrix
Row with minimum number of 1's
Subarray Sums Divisible by K (3 approaches) (Leetcode - 974)
Next Permutation (Leetcode - 31)
Word Search (Leetcode - 79)
K closest elements
Majority Element (Moore's Voting) (Leetcode - 169)
Majority Element II (Moore's Voting) (Leetcode - 229)
Trapping Rain Water (without stack) (Leetcode - 42)
Number of Ways Where Square of Number Is Equal to Product of Two Numbers (Leetcode - 1577)
Image Overlap (Leetcode - 835)
Pairs of Songs With Total Durations Divisible by 60 (Leetcode - 1010)
Pairs which are Divisible by 4 (Microsoft)
4Sum (Leetcode - 18)
4Sum II (Leetcode - 454)
Find N Unique Integers Sum up to Zero (Leetcode - 1304)
Shortest Unsorted Continuous Subarray (Leetcode - 581)
Beautiful Arrangement II (Leetcode - 667)
Non-decreasing Array (Leetcode - 665)
Maximum Gap (Leetcode - 164)
Maximum Subarray (Leetcode - 53)
Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts (Leetcode - 1465)
Pascal's Triangle (2 approaches) (Leetcode - 118)
Pancake Sorting (Leetcode - 969)
Count of Smaller Numbers After Self (Leetcode - 315)
Max Consecutive Ones II (Leetcode - 487)
Factorials of large numbers
Minimum Lights to Activate
Three Equal Parts (Leetcode - 927)
Max Chunks To Make Sorted (Leetcode - 769)
Max Chunks To Make Sorted II (Leetcode - 768)
Partition Array into Disjoint Intervals (Leetcode - 915)
Longest Harmonious Subsequence (Leetcode - 594)
Wiggle Sort (Leetcode - 280)
Fair Candy Swap (Leetcode - 888)
Array Nesting (Leetcode - 565)
Swapping pairs make sum equal
Array Pair Sum Divisibility Problem
Sort Colors (Leetcode-75)
Find Original Array From Doubled Array (Leetcode-2007)
Sum of Even Numbers After Queries (Leetcode-985)
Largest Perimeter Triangle (Leetcode-976)
Contains Duplicate II (Leetcode-219)
Set Mismatch (Leetcode-645)
Maximum Sum Circular Subarray (Leetcode-918)
Snakes and Ladders (Leetcode-909)
Sort an Array (Leetcode-912)
Can Place Flowers (Leetcode-605)
Number of Zero-Filled Subarrays (Leetcode-2348)
Kids With the Greatest Number of Candies (Leetcode-1431)
Summary Ranges (Leetcode-228)
Put Marbles in Bags (Leetcode-2551)
Group the People Given the Group Size They Belong To (Leetcode-1282)
Find the Duplicate Number (Leetcode-287)
Sort Array By Parity (Leetcode-905)
Monotonic Array (Leetcode-896)
Minimum Number of Operations to Make Array Continuous (Leetcode-2009)
Pascal's Triangle II (Leetcode-119)
Reduction Operations to Make the Array Elements Equal (Leetcode-1887)
Arithmetic Subarrays (Leetcode-1630)
Sum of Absolute Differences in a Sorted Array (Leetcode-1685)
Element Appearing More Than 25% In Sorted Array (Leetcode-1287)
Longest subarray with sum divisible by K (GFG)
Sequential Digits (Leetcode-1291)
Rearrange Array Elements by Sign.cpp (Leetcode-2149)
Number of Subarrays That Match a Pattern I and II (Leetcode-3034 and Leetcode-3036)
Find All Duplicates in an Array (Leetcode-442)
Find Missing Positive (Leetcode-41)
Find All Groups of Farmland (Leetcode-1992)
Minimum Increment to Make Array Unique (Leetcode-945)
Minimum Number of K Consecutive Bit Flips (Leetcode-995)
Minimum Difference Between Largest and Smallest Value in Three Moves (Leetcode-1509)
Minimum Number of Increments on Subarrays to Form a Target Array (Leetcode-1526)
Minimum Operations to Make Array Equal to Target (Leetcode-3229)
Count Number of Teams (Leetcode-1395)
Find the Student that Will Replace the Chalk (Leetcode-1894)
Longest Subarray With Maximum Bitwise AND (Leetcode-2419)
Minimum Time Difference (Leetcode-539)
Divide Players Into Teams of Equal Skill (Leetcode - 2491)
Count Number of Maximum Bitwise-OR Subsets (Leetcode - 2044)
Longest Square Streak in an Array (Leetcode - 2501)
Find if Array Can Be Sorted (Leetcode - 3011)
Prime Subtraction Operation (Leetcode - 2601)
Best Sightseeing Pair (Leetcode - 1014)
Find the Prefix Common Array of Two Arrays (Leetcode - 2657)
Make Lexicographically Smallest Array by Swapping Elements (Leetcode - 2948)
Max Sum of a Pair With Equal Sum of Digits (Leetcode - 2342)
Product of the Last K Numbers (Leetcode - 1352)
Partition Array According to Given Pivot (Leetcode - 2161)