Archive

2026  16

January  16

  1. Minimum Cost Path With Edge Reversals

January 27, 2026 · 2 min · BeagleHQ

  1. Minimize Maximum Pair Sum In An Array

January 24, 2026 · 2 min · BeagleHQ

  1. Maximum Side Length Of A Square With Sum Less Than Or Equal To Threshold

January 21, 2026 · 2 min · BeagleHQ

  1. Largest Magic Square

January 18, 2026 · 2 min · BeagleHQ

  1. Find The Largest Area Of Square Inside Rectangles

January 18, 2026 · 2 min · BeagleHQ

  1. Maximum Square Area By Removing Fences From A Field

January 16, 2026 · 2 min · BeagleHQ

  1. Maximize Area Of Square Hole In Grid

January 15, 2026 · 2 min · BeagleHQ

  1. Separate Squares 1

January 13, 2026 · 3 min · BeagleHQ

  1. Minimum Time Visiting All Points

January 12, 2026 · 2 min · BeagleHQ

  1. Minimum Ascii Delete Sum For 2 Strings

January 10, 2026 · 2 min · BeagleHQ

  1. Max Dot Product Of 2 Subsequences

January 8, 2026 · 2 min · BeagleHQ

  1. Maximum Product Of Split Binary Tree

January 7, 2026 · 2 min · BeagleHQ

  1. Maximum Matrix Sum

January 7, 2026 · 2 min · BeagleHQ

  1. Number Of Increasing Paths In A Grid

January 6, 2026 · 2 min · BeagleHQ

  1. 4 Divisors

January 4, 2026 · 2 min · BeagleHQ

  1. Number Of Ways To Paint Nx3 Grid

January 3, 2026 · 3 min · BeagleHQ

2025  146

December  23

  1. Last Day When You Can Still Cross

December 31, 2025 · 3 min · BeagleHQ

  1. Pyramid Transition Matrix

December 29, 2025 · 3 min · BeagleHQ

  1. Flip String Monotone Increasing

December 29, 2025 · 3 min · BeagleHQ

  1. Next Permutation

December 28, 2025 · 2 min · BeagleHQ

  1. Meeting Rooms 3

December 27, 2025 · 3 min · BeagleHQ

  1. Minimum Penalty For A Shop

December 26, 2025 · 2 min · BeagleHQ

Job Sequencing Problem

December 26, 2025 · 2 min · BeagleHQ

  1. Maximise Happiness Of Selected Children

December 25, 2025 · 2 min · BeagleHQ

  1. Minimum Cost To Cut A Stick

December 24, 2025 · 2 min · BeagleHQ

  1. Two Best Non Overlapping Events

December 24, 2025 · 2 min · BeagleHQ

  1. Apple Redistribution Into Boxes

December 24, 2025 · 1 min · BeagleHQ

  1. Delete Columns To Make Sorted 3

December 24, 2025 · 2 min · BeagleHQ

  1. Delete Columns To Make Sorted 2

December 21, 2025 · 2 min · BeagleHQ

  1. Delete Columns To Make Sorted

December 20, 2025 · 1 min · BeagleHQ

  1. Number Of Smooth Decent Periods Of A Stock

December 15, 2025 · 2 min · BeagleHQ

  1. Number Of Ways To Divide A Long Corridor

December 14, 2025 · 2 min · BeagleHQ

  1. Permutations 2

December 14, 2025 · 2 min · BeagleHQ

  1. Ipo

December 13, 2025 · 2 min · BeagleHQ

  1. Count Covered Buildings

December 11, 2025 · 2 min · BeagleHQ

  1. Count Special Triplets

December 9, 2025 · 2 min · BeagleHQ

  1. Count Number Of Odd Numbers In An Interval Range

December 7, 2025 · 1 min · BeagleHQ

  1. Count Number Of Collissions On A Road

December 4, 2025 · 2 min · BeagleHQ

  1. Amount Of Time For Binary Tree To Be Infected

December 3, 2025 · 2 min · BeagleHQ

November  25

  1. Make Sum Divisible By P

November 30, 2025 · 3 min · BeagleHQ

  1. Maximum Number Of K Divisible Components

November 28, 2025 · 2 min · BeagleHQ

  1. Maximum Subarray Sum With Length Divisible By K

November 27, 2025 · 1 min · BeagleHQ

  1. Subarray Sums Divisible By K

November 27, 2025 · 2 min · BeagleHQ

  1. Paths In A Matrix Divisible By 5

November 26, 2025 · 4 min · BeagleHQ

  1. Smallest Integer Divisible By K

November 25, 2025 · 3 min · BeagleHQ

  1. Binary Prefix Divisible By 5

November 24, 2025 · 2 min · BeagleHQ

  1. Greatest Sum Divisible By 3

November 23, 2025 · 2 min · BeagleHQ

  1. Unique Length 3 Palindromic Subsequences

November 21, 2025 · 2 min · BeagleHQ

  1. Set Intersection Size Of Atleast 2

November 20, 2025 · 3 min · BeagleHQ

  1. 1 Bit And 2 Bit Characters

November 18, 2025 · 1 min · BeagleHQ

  1. Number Of Substrings With Only Ones

November 16, 2025 · 2 min · BeagleHQ

  1. Count The Number Of Substrings With Dominant Ones

November 15, 2025 · 4 min · BeagleHQ

  1. Increment Submatrices By One

November 14, 2025 · 2 min · BeagleHQ

  1. Maximum Number Of Operations To Move Ones To End

November 13, 2025 · 2 min · BeagleHQ

  1. Minimum Number Of Operations To Convert All Elements To Zero

November 13, 2025 · 2 min · BeagleHQ

  1. Minimum Number Of Operations To Make Array Elements Equal To 1

November 12, 2025 · 2 min · BeagleHQ

  1. Ones And Zeroes

November 11, 2025 · 2 min · BeagleHQ

  1. Maximize The Minimum Powered City

November 8, 2025 · 4 min · BeagleHQ

  1. Power Grid Maintenance

November 7, 2025 · 2 min · BeagleHQ

  1. Find X Sum Of All K Long Subarrays 2

November 6, 2025 · 4 min · BeagleHQ

  1. Find X Sum Of All K Long Subarrays 1

November 4, 2025 · 2 min · BeagleHQ

  1. Minimum Time To Make Rope Colorful

November 3, 2025 · 2 min · BeagleHQ

  1. Count Unguarded Cells In The Grid

November 2, 2025 · 2 min · BeagleHQ

  1. Delete Nodes From Linked List Present In Array

November 1, 2025 · 1 min · BeagleHQ

October  20

  1. All Nodes Distance K In Binary Tree

October 31, 2025 · 1 min · BeagleHQ

  1. Minimum Number of Increments To Reach Target Subarray

October 30, 2025 · 2 min · BeagleHQ

  1. Smallest Number With All Set Bits

October 29, 2025 · 1 min · BeagleHQ

  1. Make Array Elements Zero

October 28, 2025 · 3 min · BeagleHQ

  1. Number Of Laser Beams In A Bank

October 27, 2025 · 1 min · BeagleHQ

  1. Next Greater Numericaly Balanced Number

October 25, 2025 · 1 min · BeagleHQ

  1. Maximum Frequency Of An Element After Performing Operations 2

October 25, 2025 · 4 min · BeagleHQ

  1. Lexicographically Smallest String After Applying Operations

October 19, 2025 · 1 min · BeagleHQ

  1. Maximum Number Of Distinct Elements After Operations

October 18, 2025 · 1 min · BeagleHQ

  1. Smallest Non Negative Number After Operations

October 17, 2025 · 2 min · BeagleHQ

  1. Adjacent Increasing Subarrays Detection 2

October 16, 2025 · 2 min · BeagleHQ

  1. Adjacent Increasing Subarrays Detection 1

October 14, 2025 · 1 min · BeagleHQ

  1. Design Movie Rental System

October 12, 2025 · 2 min · BeagleHQ

  1. Max Energy From Mystic Dungeon

October 11, 2025 · 2 min · BeagleHQ

  1. Minimum Amount Of Time To Brew Potions

October 11, 2025 · 3 min · BeagleHQ

  1. Successful Pairs Of Spells And Potions

October 8, 2025 · 2 min · BeagleHQ

  1. Avoid Flood In The City

October 7, 2025 · 2 min · BeagleHQ

  1. Swim In Rising Water

October 6, 2025 · 2 min · BeagleHQ

  1. Trapping Rain Water 2

October 3, 2025 · 2 min · BeagleHQ

  1. Num Bottles 2

October 2, 2025 · 1 min · BeagleHQ

September  17

  1. Find Triangular Sum Of Array

September 30, 2025 · 1 min · BeagleHQ

  1. Minimum Score Triangulation Of Polygon

September 29, 2025 · 3 min · BeagleHQ

  1. Largest Perimeter Triangle

September 28, 2025 · 2 min · BeagleHQ

  1. Valid Triangle Number

September 26, 2025 · 2 min · BeagleHQ

  1. Fraction To Decimal

September 25, 2025 · 2 min · BeagleHQ

  1. Implement Router

September 25, 2025 · 2 min · BeagleHQ

  1. Compare Version Numbers

September 23, 2025 · 1 min · BeagleHQ

  1. Count Elements With Maximum Frequency

September 23, 2025 · 1 min · BeagleHQ

  1. Design A Food Rating System

September 17, 2025 · 2 min · BeagleHQ

  1. Remove Coprimes From Array

September 16, 2025 · 2 min · BeagleHQ

  1. Vowels Game In String

September 12, 2025 · 2 min · BeagleHQ

  1. Sort Vowels In String

September 11, 2025 · 1 min · BeagleHQ

  1. Min Number Of People To Teach

September 10, 2025 · 2 min · BeagleHQ

  1. Find N Unique Integers Sum Up To Zero

September 7, 2025 · 1 min · BeagleHQ

  1. Minimum Operations To Make Integer Zero

September 5, 2025 · 2 min · BeagleHQ

  1. Max Average Pass Ratio

September 2, 2025 · 2 min · BeagleHQ

  1. Number Of Ways To Place People 1

September 2, 2025 · 2 min · BeagleHQ

August  6

  1. Alice And Bob Playing Flower Game

August 29, 2025 · 1 min · BeagleHQ

  1. Sort Matrix By Diagonals

August 29, 2025 · 1 min · BeagleHQ

  1. Diagonal Traverse

August 26, 2025 · 1 min · BeagleHQ

  1. Min Area To Cover All 1s

August 22, 2025 · 2 min · BeagleHQ

  1. Power Of 2

August 9, 2025 · 1 min · BeagleHQ

  1. Fruit Into Baskets

August 4, 2025 · 2 min · BeagleHQ

July  8

  1. Longest Subarray With Maximum Bitwise And

July 31, 2025 · 1 min · BeagleHQ

  1. Bitwise Ors Of Subarrays

July 31, 2025 · 1 min · BeagleHQ

  1. Count Max Number Of Bitwise Or Subsets

July 28, 2025 · 1 min · BeagleHQ

  1. Count Hills And Valleys In An Array

July 27, 2025 · 2 min · BeagleHQ

  1. Max Score From Removing Substrings

July 23, 2025 · 2 min · BeagleHQ

  1. Maxiumum Erasure Value

July 22, 2025 · 1 min · BeagleHQ

  1. Remove Subfolders From The File System

July 20, 2025 · 2 min · BeagleHQ

  1. Find Maximum Length Of Subsequence 1

July 16, 2025 · 2 min · BeagleHQ

June  2

  1. Longest Binary Sequence Less Than K

June 26, 2025 · 2 min · BeagleHQ

  1. Lexicographically Minimum String After Removing Stars

June 8, 2025 · 1 min · BeagleHQ

May  6

  1. Min Swaps To Sort By Digit Sum

May 24, 2025 · 2 min · BeagleHQ

  1. Longest Unequal Adjacent Groups Subsequence 1

May 15, 2025 · 2 min · BeagleHQ

  1. Finding 3-Digit Even Numbers

May 12, 2025 · 2 min · BeagleHQ

  1. Max Total Damage With Spell Casting

May 6, 2025 · 2 min · BeagleHQ

  1. Minimum Domino Rotations For Equal Row

May 3, 2025 · 2 min · BeagleHQ

  1. Push Dominoes

May 2, 2025 · 2 min · BeagleHQ

April  17

  1. Count Subarrays Where Max Element Appears Atleast K Times

April 29, 2025 · 1 min · BeagleHQ

  1. Count Subarrays Of Length Three With Condition

April 27, 2025 · 1 min · BeagleHQ

  1. Find The Most Common Response

April 27, 2025 · 2 min · BeagleHQ

  1. Unit Conversion 1

April 27, 2025 · 1 min · BeagleHQ

  1. Count Complete Subarrays In An Array

April 24, 2025 · 2 min · BeagleHQ

System Hacking - Buffer Overflows

April 24, 2025 · 5 min · BeagleHQ

  1. Count Largest Group

April 23, 2025 · 1 min · BeagleHQ

  1. Longest Subarry After Deleting One Element

April 18, 2025 · 1 min · BeagleHQ

  1. Minimize Difference Between Target And Chosen Elements

April 14, 2025 · 2 min · BeagleHQ

  1. Maximal Rectangle

April 5, 2025 · 3 min · BeagleHQ

  1. Lca Of Deepest Leaves

April 4, 2025 · 1 min · BeagleHQ

  1. Max Value Of An Ordered Triplet 2

April 3, 2025 · 1 min · BeagleHQ

  1. Unique 3 Digit Even Numbers

April 3, 2025 · 1 min · BeagleHQ

  1. Design Spreadsheet

April 3, 2025 · 2 min · BeagleHQ

  1. Max Value Of An Ordered Triplet

April 2, 2025 · 2 min · BeagleHQ

  1. Next Greater Node In Linked List

April 1, 2025 · 2 min · BeagleHQ

  1. Remove Nodes From Linked List

April 1, 2025 · 1 min · BeagleHQ

March  8

  1. Find The Most Competitive Subsequence

March 31, 2025 · 2 min · BeagleHQ

  1. Put Marbles In Bags

March 31, 2025 · 2 min · BeagleHQ

  1. Remove Duplicate Letters

March 31, 2025 · 2 min · BeagleHQ

  1. Swap Nodes In Pairs

March 30, 2025 · 1 min · BeagleHQ

  1. Substring Matching Pattern

March 30, 2025 · 2 min · BeagleHQ

  1. Apply Operations To Maximise Score

March 29, 2025 · 4 min · BeagleHQ

  1. Random Pick With Weight

March 25, 2025 · 2 min · BeagleHQ

  1. Simple Bank System

March 24, 2025 · 2 min · BeagleHQ

February  7

  1. Min Cost To Connect All Nodes

February 27, 2025 · 2 min · BeagleHQ

  1. Number Of Subarrays With Odd Sum

February 26, 2025 · 2 min · BeagleHQ

  1. Max Absolute Sum Of Any Subarray

February 26, 2025 · 2 min · BeagleHQ

  1. Eliminate Max Number Of Monsters

February 26, 2025 · 2 min · BeagleHQ

  1. Max Level Sum Of Binary Tree

February 21, 2025 · 1 min · BeagleHQ

  1. Min Difference Between Highest And Lowest Of K Scores

February 5, 2025 · 1 min · BeagleHQ

  1. Minimum Fuel Cost To Report To The Capital

February 2, 2025 · 2 min · BeagleHQ

January  7

  1. Out Of Boundary Paths

January 29, 2025 · 1 min · BeagleHQ

  1. Permutations

January 23, 2025 · 1 min · BeagleHQ

  1. Path With Max Probability

January 19, 2025 · 2 min · BeagleHQ

  1. Network Delay Time

January 19, 2025 · 2 min · BeagleHQ

  1. Reverse Words In String

January 15, 2025 · 1 min · BeagleHQ

  1. Insert Intervals

January 15, 2025 · 1 min · BeagleHQ

  1. Pacific Atlantic Flow

January 14, 2025 · 2 min · BeagleHQ

2024  91

December  5

  1. Gas Stations

December 21, 2024 · 2 min · BeagleHQ

  1. Triangle

December 6, 2024 · 2 min · BeagleHQ

  1. Happy Number

December 2, 2024 · 1 min · BeagleHQ

  1. Palindromic Substrings

December 2, 2024 · 1 min · BeagleHQ

  1. Longest Palindromic Substring

December 1, 2024 · 2 min · BeagleHQ

November  2

  1. Perfect Squares

November 26, 2024 · 2 min · BeagleHQ

  1. Longest Consecutive Sequence

November 9, 2024 · 1 min · BeagleHQ

October  1

  1. Find Median Of Data Stream

October 12, 2024 · 3 min · BeagleHQ

September  15

  1. Lexicographical Numbers

September 27, 2024 · 2 min · BeagleHQ

  1. Min Window Substring

September 27, 2024 · 4 min · BeagleHQ

  1. Max Product Subarray

September 25, 2024 · 2 min · BeagleHQ

  1. Daily Temps

September 25, 2024 · 2 min · BeagleHQ

  1. Prefix And Suffix Search

September 22, 2024 · 3 min · BeagleHQ

  1. Set Matrix Zeroes

September 21, 2024 · 2 min · BeagleHQ

  1. Next Greater Element 1

September 20, 2024 · 2 min · BeagleHQ

  1. Next Greater Element 2

September 20, 2024 · 2 min · BeagleHQ

  1. Search Words 2

September 19, 2024 · 4 min · BeagleHQ

  1. Sliding Window Maximum

September 18, 2024 · 3 min · BeagleHQ

  1. Repeated DNA Sequences

September 15, 2024 · 2 min · BeagleHQ

  1. Design Add And Search Word Data Structure

September 15, 2024 · 3 min · BeagleHQ

  1. Implement Trie

September 14, 2024 · 4 min · BeagleHQ

  1. Palindrome Partitioning

September 11, 2024 · 2 min · BeagleHQ

  1. 3 Sum

September 1, 2024 · 2 min · BeagleHQ

August  19

  1. Best Time To Buy And Sell Stock

August 29, 2024 · 1 min · BeagleHQ

  1. Isomorphic Strings

August 29, 2024 · 2 min · BeagleHQ

  1. K Diff Pairs In An Array

August 27, 2024 · 3 min · BeagleHQ

  1. Max Enemy Forts That Can Be Captured

August 23, 2024 · 2 min · BeagleHQ

  1. Boats To Save People

August 19, 2024 · 2 min · BeagleHQ

  1. Linked List Cycle Detection

August 15, 2024 · 1 min · BeagleHQ

  1. Linked List Cycle 2

August 15, 2024 · 2 min · BeagleHQ

  1. Max Twin Sum Of Linked List

August 15, 2024 · 2 min · BeagleHQ

  1. Find Duplicate Number

August 15, 2024 · 2 min · BeagleHQ

  1. Middle Of Linked List

August 15, 2024 · 2 min · BeagleHQ

  1. Subarray Sum Equals K

August 9, 2024 · 2 min · BeagleHQ

  1. Find Pivot Index

August 9, 2024 · 2 min · BeagleHQ

  1. Range Query 2D

August 7, 2024 · 6 min · BeagleHQ

  1. Range Sum Query

August 4, 2024 · 2 min · BeagleHQ

  1. Trapping Rain

August 3, 2024 · 4 min · BeagleHQ

  1. Remove Duplicates From Sorted Array

August 2, 2024 · 4 min · BeagleHQ

  1. Container With Most Water

August 1, 2024 · 2 min · BeagleHQ

  1. Valid Palindrome

August 1, 2024 · 2 min · BeagleHQ

  1. 2 Sum 2

August 1, 2024 · 2 min · BeagleHQ

July  23

What If Not Riverpod

July 29, 2024 · 2 min · BeagleHQ

  1. Longest Repeating Substring With Replacement

July 25, 2024 · 3 min · BeagleHQ

  1. Minimum Size Subarray

July 24, 2024 · 2 min · BeagleHQ

  1. Fair Distribution Of Cookies

July 22, 2024 · 3 min · BeagleHQ

  1. Number Of Sub Arrays Of Size K And Average Greater Than Or Equal To Threshold

July 20, 2024 · 2 min · BeagleHQ

  1. Contains Duplicates 2

July 20, 2024 · 2 min · BeagleHQ

  1. Longest Turbulent Subarray

July 16, 2024 · 2 min · BeagleHQ

  1. Sum Of Power Of All Subsequence

July 15, 2024 · 3 min · BeagleHQ

  1. Max Circular Subarray

July 14, 2024 · 2 min · BeagleHQ

  1. Max Subarray

July 13, 2024 · 2 min · BeagleHQ

  1. Longest Common Subsequence

July 12, 2024 · 4 min · BeagleHQ

  1. Min Stack

July 12, 2024 · 2 min · BeagleHQ

  1. Reverse Bits

July 12, 2024 · 2 min · BeagleHQ

  1. Number Of One Bits

July 12, 2024 · 1 min · BeagleHQ

  1. Counting Bits

July 12, 2024 · 2 min · BeagleHQ

  1. Sort Colors

July 12, 2024 · 2 min · BeagleHQ

  1. Unique Paths

July 8, 2024 · 2 min · BeagleHQ

  1. Unique Paths 2

July 8, 2024 · 2 min · BeagleHQ

  1. House Robber

July 7, 2024 · 2 min · BeagleHQ

  1. Course Schedule

July 6, 2024 · 3 min · BeagleHQ

  1. Clone Graph

July 5, 2024 · 3 min · BeagleHQ

  1. Shortest Path In Binary Matrix

July 1, 2024 · 5 min · BeagleHQ

  1. Rotting Oranges

July 1, 2024 · 3 min · BeagleHQ

June  26

  1. Number Of Islands

June 29, 2024 · 2 min · BeagleHQ

  1. Product Of Array Except Self

June 29, 2024 · 3 min · BeagleHQ

  1. Longest Substring Without Repeating Chars

June 29, 2024 · 2 min · BeagleHQ

  1. Max Area Of Island

June 29, 2024 · 3 min · BeagleHQ

  1. Two Integer Sum

June 28, 2024 · 1 min · BeagleHQ

  1. LRU Cache

June 28, 2024 · 3 min · BeagleHQ

  1. Contains Duplicate

June 28, 2024 · 1 min · BeagleHQ

  1. Last Stone Weight

June 25, 2024 · 2 min · BeagleHQ

  1. Kth Largest Element

June 25, 2024 · 2 min · BeagleHQ

  1. K Closest Points

June 25, 2024 · 2 min · BeagleHQ

  1. Partition Labels

June 23, 2024 · 2 min · BeagleHQ

  1. Combination Sum

June 21, 2024 · 3 min · BeagleHQ

  1. Subsets

June 20, 2024 · 3 min · BeagleHQ

  1. Path Sum

June 19, 2024 · 3 min · BeagleHQ

  1. Construct Binary Tree

June 18, 2024 · 5 min · BeagleHQ

  1. Right Side View

June 18, 2024 · 2 min · BeagleHQ

  1. Kth Smallest Node In BST

June 13, 2024 · 3 min · BeagleHQ

  1. Merge K Sorted Lists

June 10, 2024 · 4 min · BeagleHQ

  1. Delete Node in BST

June 8, 2024 · 7 min · BeagleHQ

  1. Climbing Stairs

June 7, 2024 · 2 min · BeagleHQ

I Did Some Reading…

June 7, 2024 · 2 min · BeagleHQ

  1. Search 2D Matrix

June 6, 2024 · 3 min · BeagleHQ

  1. Koko Eating Bananas

June 5, 2024 · 3 min · BeagleHQ

The Idea

June 5, 2024 · 1 min · BeagleHQ

Why *

June 5, 2024 · 2 min · BeagleHQ

Xcode

June 5, 2024 · 1 min · BeagleHQ