Kude
- kude
Japan- Other
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Contests (41)
March Cook-Off 2021 Division 3
Consecutive Deletions, Water Transfer, Pawri Meme, Matrix XOR, Weight Balance, Guess the Number
March Lunchtime 2021 Division 2
Racing, Lunchtime, Gamer
SPYBITS IIT BHU Division 2 (Rated)
B - Valentine Couples, C - Mission Gotham, D - Pilgrims Destination, E - Minimum Operation, F - Stone Land, A - Save Water Save Life
May Cook-Off 2021 Division 2
The Last Problem, Permutation Swaps, Falling Zero, Double Burgers, Chef and Subarrays
May Lunchtime 2021 Division 1
Tokens On A Tree, Total Components, K-Subarrays
May CodeChef Starters 2021 Division 1 (Unrated)
Cheating Time, Minimum Popping, Plagiarism, Lazy Chef, Correct Sentence
June Cook-Off 2021 Division 1
Binary String on Steroids, Battle Royale, Polynomial Root
July Cook-Off 2021 Division 1
Beautiful Subsequence, Mod Equality, Hidden Colored Graph, Make the Matrix Beautiful
CodeChef Starters 6 Division 1 (Unrated)
Joker and Batman, Chefs Homework Dilemma, Even tuples, Palindromic number, Three Dices, Cricket Ranking
August Challenge 2021 Division 1 (Unrated)
Special Triplets, Array Filling, Geometry 1, Chef and Bulb Invention, Alternating LG Queries, Charge Scheduling, Chef and Digits of Large Numbers, Fat Hut, Problem Difficulties, Olympics Ranking
August Lunchtime 2021 Division 1
Bunny Hops, Just a Graph, Longest Spanning Substrings
CodeChef Starters 9 Division 1 (Unrated)
Friend Groups In A Line, Black cells in a chessboard, Large Square, Bus full of passengers, Fibonacci concatenation, India Fights Corona
AlgoManiac - Code For Future Division 1 (Unrated)
Planetary Path, Two Shades Of A Tree, Say No To Drugs, The Rumbling, The Old Saint And Three Questions, Meet In The Median
September Challenge 2021 Division 1 (Unrated)
XOR Equal, Shuffling Parities, Minimize Digit Sum, Treasure Hunt, 2-D Point Meeting, Airline Restrictions, Travel Pass, Covaxin vs Covishield, Minimum Digit Sum 2
September Cook-Off 2021 Division 1
Chess Kings Chasing Game, Chef and Pairwise Distances, Permutation and GCD Set, Half Sequence, Fake Swaps
SnackDown 2021 - Online Qualifiers
Prefix as a Substring 2, Lucky Number, Maximum Number Of Distinct Elements, Minimise Difference
CodeChef Starters 11 Division 1 (Unrated)
Positive Spewing, The Grid Fill Problem, Find the Direction, Obtain the Sum, The Two Dishes, A Counting Problem
CodeChef Starters 12 Division 1 (Unrated)
K - balanced string, Good Weather, Make it Divisible, Another Shortest Paths Problem, Maximum Points, The Minimum Game
CodeChef Starters 14 Division 1 (Unrated)
Odd GCD, Task Times, Diagonal movement, FIXFIX, RCB and Playoffs
October Challenge 2021 Division 1 (Unrated)
Chef at the Olympics, Longest AND Subarray, Digit Removal, MEX-OR, Three Boxes, Yet another MEX problem, Which Mixture, Characteristic Polynomial Verification, Hidden Points
September Lunchtime 2021 Division 1
Interesting Representation, Subsequence LCS, Alice vs Bob Faceoff
CodeChef Starters 16 Division 1 (Unrated)
Professor And Directions, Chef And Salary Pay, K - Magical String, Chef and Magical Steps, Subarray Sum, Pass or Fail
October Cook-Off 2021 Division 1
Can You Reach The End, Find the Modulus, Chef Up, Permutation Sorting Game
SnackDown 2021 - Online Round 1A
Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Equal Beauty, Lazy Machine, Min Max LCM
SnackDown 2021 - Online Round 1B
Queens Placement , Largest Laddu, Help Nishant
November Challenge 2021 Division 1 (Unrated)
Flip or Compress, Functional Array, Wildcard Replacement, Xor Equation, Weird Palindrome Making, Hill Sequence, Equal Coins, Which Fuel is Cheaper, Maximise the bridges, Convex Hulk
SnackDown 2021 - Online Pre-Elimination
Non-Decreasing Subsequence of size K, Good ranking, Product Pain, Guests like slippers
SnackDown 2021 - Online Elimination Round (Rated for all)
Random Convex Hull, Graduate Work Matters, Sorting Segments
CodeChef Starters 17 Division 1 (Unrated)
Binary Inversion, GCD of Prefixes, Yet Another Counting Problem, String Game, Partition It, Chef on Vacation, Find the Special Node, New Piece
CodeChef Starters 18 Division 1 (Unrated)
Weird GCD Value, Palindromic Binary Numbers, Expectations on a Permutation, Compare those strings, Back to Campus, Make them equal
CodeChef Starters 19 Division 1 (Unrated)
Binary String Randomizer, P Equal To NP, The Alternating Sum, Distinct Elements, Three Bikes
CodeChef Starters 20 Division 1 (Unrated)
Finding Pairs, Stable Sequence, Weird Values, Brutal-Xors
C.O.D.E.R.S Division 1 (Unrated)
The One Where No One is Ready, The One with All the Candy, The One Where Joey Dates Rachel, The One with Ross Wedding
FizzBuzz Division 1 (Unrated)
Magical Planks, Clean The Sequence, Lucky Ali, Sweet Change, Substring Minimum Function, Can_Reach, Can You Eat It, Kingdom Attack
November Lunchtime 2021 Division 1
Min-Max Rotations, Permutation Pairs, Subarray Jumps
December Challenge 2021 Division 1 (Unrated)
Increasing String , Yet Another Tree Problem, Valleys and Hills, Rock Paper Scissors, Pyramid Traversal, Min Manhattan Distance, Squares Counting
December Cook-Off 2021 Division 1
Binary String Game, Destructive Nim, RGB Construction, Break the Balance
December Lunchtime 2021 Division 1
In-tree-active Node Coloring, Optimal Sorting, Romantic Reversals, Sleep Technique
CodeChef Starters 21 Division 1 (Unrated)
Devendra and Water Sports, Akash and Grid, Magical Subsequence, ChefWM, And Or Union, Covid and Theatre Tickets, Mean equals Median, The Melancholy of Problem Setter
CodeChef Starters 22 Division 1 (Unrated)
Convert Strings by Flips, Merging Binary Strings, Equal LIS, Convert Strings by Flips 2
Infinity 2k21 Division 1 (Unrated)
Marbles, Ddakji, Tug of War, Escape Plan, Hopscotch, Dalgona Treat
Code Drive Division 1 (Unrated)
Count of Array, Break And Fix The Tree, Sum this up, Again XOR problem, Maximum Factors Problem, Count Number of Peaks
January Long 2022 - I, Division 1 (Unrated)
Keplers Law, Sequence Master, Generating Cycles, Prime in a binary string, Retrieve back the Array, Covid Spread, Chef and Riffles
January Long 2022 - II, Division 1 (Unrated)
Array Partition, Power Sum, Tree Master, Sum and OR, Crying Colours, TCS Examination, Chef and Fixed Deposits
Exun 2021-22 Division 1 (Unrated)
Sarthak and his Magic Grid, Vedant and his Hidden Array, Aujasvit and the Circle Game, Neil and his Binary Tree, Harshikaa and the Rain, Sarthak and his Set of Primes, Vishesh and his Hate for Even Numbers
January Cook-Off 2022 Division 1
Subsegment Divisibility , Merged LIS, Boring Trip, Prime Graph, Erase All But One
CodeChef Starters 23 Division 1 (Unrated)
Average of Three, Chef and Profits, Subarray Mex, Maximise the Minimum, Maximising Vacations, Non Zero Subarray Xor
January Lunchtime 2022 Division 1
Circular Permutation Recovery, Permutation XOR Sum
CodeChef Starters 24 Division 1 (Unrated)
Anti Palindrome, Palindrome Love, Special String, Divisors and Reciprocals
February Long 2022 - I, Division 1 (Unrated)
Random OR, Digit Multiplication By K, Binary Base Basics, Bitwise Blend, Remove Adjacent
CodeChef Starters 25 Division 1 (Unrated)
Building Towers, Equal MEX, Hidden Permutation, Count Arrays, K Distinct Array, Points and Lines, Fit in Data Type, Chef and His Fruit Stand
February Cook-Off 2022 Division 1
Xor Becoming Uncanny, Perfect Permutation, PerMEXuation , Mango Market, Slingshot
February Long 2022 - II, Division 1 (Unrated)
Avoid Fixed Points, World Chess Championship, Sequence GCD, Area Sums in Convex Polygons, Bitwise swaps, Chef and NextGen, Xor Palindrome
CodeChef Starters 26 Division 1 (Unrated)
Stone Game, Array Division, Careless Chef
CodeChef Starters 27 Division 1 (Unrated)
String Reverse, Or Sum, Distinct Binary Strings, And Equals Or, Non Coprime Neighbours, Get Lowest Free, Too many items, Shopping Change, Blackjack, The product mystery
February Lunchtime 2022 Division 1
Permutation Xor, Chef Cooks Permutation, Visit Them All, Magical Modulo, Magnet Sort
CodeChef Starters 28 Division 1 (Unrated)
Counting Pairs, Chef and Instant Noodles, Travelling in the Graph, Permutation Xority, Self Defence Training, Interactive Tree, Car Choice, Qualify the round, Count the Holidays, Broken Dreams, Interactive Tree 2
March Long One 2022, Division 1 (Unrated)
Akash and Function, Subarray XOR, Substring of a Substring, Akash and Missing Class, Count the Ones, Exact Marks, MEX on Trees, Discus Throw, Bath in Winters, Wordle
CodeChef Starters 29 Division 1 (Unrated)
Plusle and Minun on Array, Increase 2 consecutive characters, Decomposition Reaction, Max Heat
March Long Two 2022, Division 1 (Unrated)
Minimum Longest Substring, Same Parity Swaps in Binary Strings, Kostomuksha and AESC MSU, Perfect Imperfections 2
CodeChef Starters 30 Division 1 (Unrated)
Squeeze OR, Minimum Coloring, Maximizing LIS, Gift Shop and Coupon, Chef and Water Bottles, Swapping Chefs Way, Prefix Suffix Operations, Chef and Chocolates, Unbalanced Reversals, Balanced Reversals
March Cook-Off 2022 Division 1
Dragonado And XOR, Alternating Divisibility
CodeChef Starters 31 Division 1 (Unrated)
Pile Partition, Xor Travellers, XOR and AND, Alternating String, Sign Moves, Cup Finals, Mexy Array, The Unchanging OR, Group Assignment, Economics Class
March Lunchtime 2022 Division 1
Mathology, Winter, Adjacency Love, Separate Them All
CodeChef Starters 32 Division 1 (Unrated)
Maximize the Minimum, Binary String Cost, LR Shirts, Volume Control, Finding Shoes, Training Plans, Two Merchants, Flip Sorting, Avoid Alternating, Course Registration
April Cook-Off 2022 Division 1
Chef Goes Shopping, Sorted Distances, Sequence Cost, Max LCA Sum
CodeChef Starters 33 Division 1 (Unrated)
Max BIT Sum, Stable Mex, Array operations, Distinct Dilemma, Broken Life, The Cheaper Cab, Monthly Budget, Minimum Cars required, Non Adjacent Flips, Make Them Equal
April Long One 2022 Division 1 (Unrated)
Yet Another Mex Problem, Dazzling AXNODR Challenge , Bullets and Enemies, Min Max Equality, Pairwise Xors
CodeChef Starters 34 Division 1
Binary Mismatch, Average Array, Binary String Xor, Count The Arrays, Is the Score Consistent, Good Quality Bulbs, Positive Products, Lulymp, Expiring Bread, Good Permutation
April Lunchtime 2022 Division 1(Rated)
Modular Circular Permutations, Do Not Touch the MEX!!!, Secret Machine Mania
Starters 35 Division 1 (Unrated)
Help Chef, Jump to Sibling, Chef Find XOR Beautiful, Concurrent Lines
Starters 36 Division 1(Unrated)
Valentine Vex, Maximum Value from Binary strings, Buying Sweets, Reduce to 1, Three Arrays, Who is taller!, Presents for Cheffina, All Roads Lead To Rome, Chef and Chapters, Chef and Bird farm
April Long Two 2022 Division 1 (Unrated)
Geometric Mean Inequality, Sasta Shark Tank, Yet Another LIS Problem, Antipodal Points, Akash and Equal Mean, Flip to Invert, Chef And Division, Six Friends, Best Coupon, Pseudo Sorted Array
May Cook-Off 2022 Division 1 (Rated)
Split Powers Of 2, Different Subarrays Rearrange, Triple Inversions
Starters 37 Division 1 (Unrated)
Remove Balance, Dazzling Even-Odd Challenge, Beat the Average, Maximum OR Minimum, Too Mean
May Long One 2022 Division 1 (Unrated)
Mystical Numbers, Pushpa , In The Green Zone, The Magical Stone, Alternating Diameter, Four Arrays, Sugarcane Juice Business, The Attack of Queen, Football Cup, Miami GP
Starters 38 Division 1 (Unrated)
A Bit Easy, Chef gives Party, Get Subscription, Good Pairs, Average Gift, Maximum XOR, Anti-knapsack, Rotate it, Dominant Army, Circular Track
May Lunchtime 2022 Division 1 (Rated)
Balanced 0-1 Tree, Equal After And, Rearrange Ranges
Starters 39 Division 1 (Unrated)
Compress the Video, Crazy Substrings, Minimize Blocked Roads, Yet Another Palindromic Problem, Closest Vowels, Recent contest problems, My very 1st contest!, Even Subarray XOR, A or B, Chess Ratings
May Long Two 2022 Division 1 (Unrated)
Subarray Weight, Practice makes us perfect, Subsequence-Numbers Divisible by 7, Not Tree Again!, Xor Palindrome, Subarrays with length, Score High, Total Prize Money, Make them Zero, Degree of Polynomial
Starters 40 Division 1 (Unrated)
The Three Bogatyrs, Difficulty Rating Order, Max Value of MST, Infinity Staircase, 7th Love, Doubt Support Availability, Or Permutation, Good Pairs, Whatsapp Messages, Take discount or Not
July Cook-Off 2022 Division 1 (Rated)
String Break, Partition Queries, Segmentation Fault, Subsequence LCM
Starters 41 Division 1 (Unrated)
Equal Integers, Chef and Brain Speed, Chef and Chocolates, Black and White, Remove and Add, Is this priority or parity!, Path Parity, Parity Fun, Dearrange sorting, Determine the Winner
June Cook-Off 2022 Division 1 (Rated)
Throw and Take, Simple XOR, Prefix Suffix Distinct, Split AND Sum
Starters 42 Division 1 (Unrated)
Construct An Array , Sorting Array, Maximise Set Bits , Maximise Score, Minimum or Maximum, Divisible by 3, How Many Maximums, Age Limit, Equal Distribution, Minimum number of Flips
June Long One 2022 Division 1 (Unrated)
Full Path Eraser, Expected move, Reduce to zero, Add By Permutation, Chairs Requirement, Subscriptions, Divisible by i , Possible GCD, Alternate Additions, Equal Strings
Starters 44 Division 1 (Unrated)
Palindromes Not Allowed, Alternating Strings, Atleast and Atmost, Triple Xor, Too Many LIS, Dense Bracket Sequence, Biryani classes, Air Hockey, The Attack of Knight, Jogging
Starters 43 Division 1 (Unrated)
Avoid The Landmines, Array Sorting, Make them Equal, The Optimal Pairs, Permutation AND, Burgers, DNA Storage, Distinct Palindrome, Joining Date, Waiting Time
June Lunchtime 2022 Division 1 (Rated)
The Lost Array, Max Shift After XOR, XOR Times 2 Is Sum, Minimum Xor On Segment
June Long Two 2022 Division 1 (Unrated)
Counting Is Fun, Gcd and Lcm , Count the ACs, Make all equal using Pairs, AP Grid, The Subarray XOR, Complementary Strand in a DNA, Reversal Sorting, Fitness, Strong Elements
July Long One 2022 Division 1 (Unrated)
Largest Square in the garden, Bidding, Expected Difference, Journey of the Knight, Game of Piles Version 1, Game of Piles Version 2, Find A, B, C, Slow Solution, Pass the Exam, Chef and Candies
Starters 46 Division 1 (Unrated)
Prime Xor, Vowel Anxiety, Maximum Diversity, Equal Subsequences, Array sorting, Sort the String
Starters 47 Division 1 (Unrated)
Chef On Date, Too Many LIS 2, Chef and Minimum Cost of His Tree, Copy and Push Back, Similar Heights, Construct N, The XOR-OR Dilemma, End Sorted, Minimum Coins, Chess Time
July Lunchtime 2022 Division 1 (Rated)
Binary String Happiness, Consecutive XOR, Largest Family
Starters 48 Division 1 (Unrated)
Fixed Sum, Mex Chef, Strict Permutation, Buy Lamps, Fill The Grid, Passes for Fair, Fill Candies, Make Palindrome 2, Positive array, Accurate XOR
July Long Two 2022 Division 1 (Unrated)
Maximize Difference, Concat Sort, Chef in his Office, To Divide or Not To Divide, Sum of Product 1, Sum of Product 2, Similar Subsequence, Insurance, Hungry Chef
Starters 49 Division 1 (Unrated)
Students-Far From Hostel, N Buttons 1 Bulb, Split The String, High Frequency, Good Indices, BFS before DFS, Is it hot or cold, Maximise the Tastiness, Monks, Valid Minimum
Starters 50 Division 1 (Unrated)
Air Blimp, Permutation GCD, Beautiful Array, Sum Product Segments, Bad Tuples, Discount, Mileage matters, Add Subtract Equalize, Nearest Court, Average Permutation
Starters 51 Division 1 (Unrated)
Chef & Cook Game, Differentiation, Prefix Suffix And Or, Adjacent Xors, Split N, Copy and Paste, Final Population, Different Medians, TV Discount, Dominant Element
August Long 2022 Division 1 (Unrated)
Angled Flip, Tree of Trees, Sale Season, XOR with smallest element, Hello Equation, Two Trains, Maximum Submissions, Make A and B equal, Crazy Subsequences
Starters 52 Division 1 (Unrated)
AI Analysing Code, Minimum Sum, WA Test Cases, Air Conditioner Temperature, K-Flip, Gritty Grid, Flipping Failure, Nil Xor
August Lunchtime 2022 Division 1 (Rated)
Sort the Array, Tree Coloring, Subtract 12 Operation, MEX Permutation Difference
Starters 53 Division 1 (Unrated)
Black&White Ring Game, Rocket Pack, Make It One, Winter Is Here, Car Trip, Greater Average, Odd Pairs, Make A and B equal, Queen Blocks, Weights
Starters 54 Division 1 (Unrated)
Equal Distinct, Subarray Game, Number of Credits, Ticket Fine, Departments (Hard Version), K Flip, Team of Two, Departments (Easy Version)
Starters 55 Division 1 (Unrated)
Disgust Minimization, Non Zero Xor, Ball Sequence, Balls and Boxes, Arithmetic Jumping, Permutation Clear, Fever, Mean and Median, Broken Phone, OR Tuples
September Long 2022 Division 1 (Unrated)
Speed Limit Test, Bob at the Bank, Chef and Wire Frames, Yet Another Chef And Numbers, Distinct Numbers, Pokemon Battles, Alone Alice!, Interesting Subarray, Good Pairs
Starters 56 Division 1 (Unrated)
K-Subarrays, Energetic Node(Easy Version), Energetic Node(Hard Version), Palindrome Swaps, Binary Substitution, Nearest Exit, Chefland Games, Maximize Colours, Far Away
September Lunchtime 2022 Division 1 (Rated) (Based on EJOI)
Increasing Addition, Remove Numbers, Adjacent Pairs, Where Is the Root, Longest Unfriendly Subsequence
Starters 57 Division 1 (Unrated)
Alice and Marks, Integers that sum to the same value, Tree and Divisors, Delicious Queries, Maximum Expression, Even Splits, Non-Negative Product, Two Different Palindromes
Starters 58 Division 1 (Unrated)
Piles Parity, Break the elements, Equivalent Numbers, Ranklist Pages, Good Arrays, Reach the Target, Add to Subsequence, Remove Bad elements
Starters 59 Division 1 (Unrated)
Chef and Happy String , K - Beautiful Permutation, Maximum Subarray , Seven-Segment Factoring, Suspense String, Confusing Concatenations, Audible Range, Speciality, Alternative Sufferings
October Long 2022 Division 1 (Unrated)
A drawing game, Chef And Array Construction, Twos and Zeros, Podium Finish, Minimum Pizzas, Binary Substituition, Building Race, Single Operation Part 1, Single Operation Part 2
Starters 60 Division 1 (Unrated)
Distinct Numbers, Expert Setter, Maximum Sum, Red Green Grids, Yet Another Palindrome Problem, Tax in Chefland, Tri XOR, Paper Cutting, Palindrome Flipping, Card Removal
Starters 61 Division 1 (Unrated)
Equal Inversions, Palindrome Partition, Minimise LCS, Different Consecutive Characters , Weird Subarrays, Red Blue Flowers, Row Bombing, Subarray Removal, Reach on Time, Odd Sum Pair
Starters 62 Division 1 (Rated for 5 & 6 stars)
Get the Segment, Strange BST, Disjoint XOR, Sorted Substrings, Make Multiple, Final Sum, Pythagorean Pair, X Jumps, Max minus Min, Test Score
Starters 63 Division 1 (Rated for 5 & 6 stars)
Distinct Neighbours , Maximize 1s, Count Partitions , GCD Sort, One-XOR Deletions, Packing Books, Make Length 1, Minimum Absolute Score, Tasty Decisions, Greedy Grid Moves, Avoid Squares Please
Starters 64 Division 1 (Rated till 5-stars)
Luigi and Uniformity, Square Sort, Xor Array, Prime Factor Division, Distinct Neighbours
Starters 65 Division 1 (Rated for 5 & 6 stars)
Coordinate Points, Nahaane Jaa, Paisa Double, Binod, Gormint Aunty, Potato to Gold, Lazy Ancestors
November Long 2022 Division 1 (Unrated)
MaxEdges, Minimize swaps, Minimum BFS Length, Split and Maximize, Spliting Balls, Alice and the Array, Time Complexity, Water Mixing, String Game
Starters 66 Division 1 (Rated till 5-stars)
Sorting the Binary String, Good Binary Strings, Palindrome by Splitting, Palindrome In Making, Chef and Spice Grid, Just Like Mob!, Binary Battles, Squats, Minimum value of special tables, Monopoly in Chefland
Starters 67 Division 1 (Rated till 5-stars)
Interactive Tree, Maximum Angriness, Musical Rods, Count Number Of Pairs, Existence Of X
Starters 68 Division 1 (Rated till 5-stars)
AP On Trees, Boring String, Restore the Permutation, XOR Product, Expense List, Interesting Array, Bull or Bear, Make AP, Make Money
Starters 69 Division 1 (Rated till 6-stars)
Akash and Dinner, Rain in Chefland, Make everything divisible by 3, Passing Through!, Scalene Triangle, Convert to permutation, Distinct Sequence, Longest Subarray, Sort Permutation
Starters 70 Division 1 (Rated till 6-stars)
Strange Bitwise Operation, X AND Y Tree, Two Counters, Prime Reversal, Frequency Array Retrieval
Starters 71 Division 1 (Unrated)
Pet Store, Flip the Prefix, Unique Mode, Instagram, Snapchat, Expected Sum, Perfect Trio, Maximizing LCS, Smallest Difference
December Long 2022 Division 1 (Unrated)
Counting Subsequences, Not Divisible, Break into Powers, Sum of Cube , Divisible by A_i, Gcd of Subarrays, Good Investment or Not, Divisible by K, Reach fast, Maximise XOR
Starters 72 Division 1 (Rated till 5-Stars)
N Triplets, Good Sequence, Good Arrangement, No sequence, Base or Bias, XOR Tree
Starters 73 Division 1 (Rated till 6-Stars)
Minimum OR Path, Find an integer, Consecutive Xor, First To Last, Chef Plays Ludo, Multivitamin Tablets, Hamiltonian Tree, Lucky Numbers, Append for OR, Elevators
Starters 74 Division 1 (Rated till 6-Stars)
Facebook, Candies, Maximum Xor Sum, Mana Points, Distinct Values, Chef And Babla, Power Tree, Lcm hates Gcd, Medicine Strength, Minimal Inversions, Odd Even Binary String
Starters 75 Division 1 (Rated till 6-Stars)
Sum of range distinct queries, Chefs Favourite Function, Minimum Replacement, Equal Hamming Distance, Prefix Ones
January Long 2023 Division 1 (Unrated)
A Short Counting Problem, Asymmetric Swaps, Swap Shift, Maximum of GCDs, Symmetric Swaps, Minimize the Maximum, Array Halves, Far from origin, Overspeeding Fine, Negative Product
February Cook-Off 2023 Division 1 (Rated)
Take Not Less, Alice Potter and OWL, Alice Potter And Dumbledore Army
Starters 77 Division 1 (Rated till 5 Stars)
Yet Another XOR Sort, Sort a String, K Forests, Tekken, Tom and Jerry Chase, Codechef Airlines, Concat Palindrome, K Increment Palindrome, Three Numbers
Starters 78 Division 1 (Rated till 6 stars)
Yet Another XOR Sort 2, MinAdd, Bitwise Equation, Balanced Suffix, Valid Expression, Passing Marks, Candy Store, Good Turn, Solve More Problems!, Divisible Subarray Counting
Starters 79 Division 1 (Rated till 5 Stars)
Love Squares Hate Cubes, K-Beautiful Subarrays, Mountain, One Stone or Two Stones, Split or Decrease
Starters 80 Division 1 (Rated till 5 stars)
Permutation Subsequence, Three-People Contests, c8kbf and Tree, Prefix Permutation, Eat Rock!, Matrix Pain, Just One More Episode, Single-use Attack, Running Comparison, Equal Elements
Starters 81 Division 1 (Unrated)
Beautiful Strings, Horde Chess, Unimodal Subsets, Distinct Matrix, Divide Pages, Maximum Capacity, Sunny Day, Arrange the array, Binary Ternary
Starters 82 Division 1 (Rated till 6 stars)
Mode!, Meet over Grid, Make Them Alike, Find eX, Good Permutations, Difference Matrix
Starters 84 Division 1 (Rated till 6 Stars)
SUM OR, Max count of 1, Digit Operation, Chef And Adjacent Sums
Starters 85 Division 1 (Rated till 6 stars)
Crazy Bishops on Chessboard, Efficient PAN Linking, Tree Xor, GCD Queries, Bomb Blast, TripTastic
Starters 86 Division 1 (Rated for All)
Least Size, Minimum Operation, Sum Over All Arrays, String Game , Prefix Max, Largest Y
Starters 87 Division 1 (Rated till 6 Stars)
OR-XOR, Count the Permutations (always), Four Tickets, Buy Ten Packets, Return the Change, Checkpoint, Inversions of subsequences, Existence, AB plus C, One or All
Starters 83 Division 1 (Rated)
Mex Segments, Construct String, Order by XOR, Saber Slays, Rotate to Minimum, Restoration
Starters 88 Division 1 (Rated till 6 Stars)
Maximum And Or, Chef and Asteroids, Good Operations, Minimize the Bits, Chef and Good Array, Minimum OR Spanning Tree
Starters 89 Division 1 (Rated till 5 Stars)
Positive or Negative Subarrays, Subarray Removal, Two Averages, Restore Communication, Evil Infection
Starters 90 Division 1 (Rated till 6 Stars)
Crushed Apples and a Balance Scale, Minimum Ugliness, Sum of Goodness, Printing Binary Array, Anti Palindrome
Starters 91 Division 1 (Rated till 6 Stars)
Cheapest Office, XOR & Sum, Limited Shopping, Odd GCD Permutation, Chef Odd, Maximum Sum Permutation
Starters 92 Division 1 (Rated till 6 Stars)
Rectangular Tiling, Dividing into Groups, A Peculiar Arrangement, Chef and Polygons, Chef Graph, Beautification of array, Distance Coloring, Dotify Playlist, Water Filling, Oneful Pairs
Starters 93 Division 1 (Rated for All)
Thank U, Next, Why Try, NASA, Greedy, Bloodline, Motive
Starters 94 Division 1 (Rated till 5 Stars)
Place The Number, Possible or Not, Search for 404, Special Operation, The Vowel Matrix, Rank Queries
Starters 95 Division 1 (Rated till 6 Stars)
Chef and Moves of GCD, Partition and Maximize, Boxes, Transfusion Chain, Break This Array
Starters 96 Division 1 (Rated till 5 Stars)
Swap the numbers, Remove Stones, Zero Array, Mex Array, Absolute Differences
Starters 97 Division 1 (Rated till 6 Stars)
Make It Special, Unreachability Cost, Chef and Division, No Palindrome, Triplets Min
Starters 98 Division 1 (Rated till 6 Stars)
3-Blast Palindrome, Happiness , Build Towers, Ball Distribution, Some Queries, Sub-Array With Maximum Sum
Starters 99 Division 1 (Rated till 6 Stars)
Segment Three, Maximize Ones, Two Piles, Yet Another Bitwise Problem, Exclusion-Inclusion
Starters 100 Division 1 (Rated)
Prime Permutation, Stamps 100, Concussive Sequence, Ant
Starters 101 Division 1 (Unrated)
Minimize Xor Difference, Split and ADD, Snakes on a Grid, Partially Increasing Array Queries, Warrior Chef, Work Smarter, Not Harder, Lockpicking Chef, Off By One
Starters 102 Division 1 (Rated till 6 Stars)
Chess ELO, Parity Permutation, Circular Trouble, Light The Bulb, Chef Segment, Bit Play, Array Sum, Sports Section, Selling Insurance, Chef and Stocks
Starters 103 Division 1 (Rated till 6 Stars)
Cost Distribution, Squarified, X-Ray Grid, Chandelier, Unique xor, Divisible By 8
Starters 104 Division 1 (Rated till 6 Stars)
Find Diameter, Longest Non Decreasing Subsequence, Lexicographically Largest , Construct An Array, Maximise Sum
Starters 105 Division 1 (Rated till 6 Stars)
Ghoul-icious Goodies, Reaper Reaps, Racing Dead, Spooky Sequences, Dull Operation, Wishcraft
Starters 106 Division 1 (Rated till 5 Stars)
Fan Poll, Chef Fantasy 11, Playing with OR, Save People, Guess the winner!, Count Possibilities, Smallest Excluded LCM, Reach Anywhere, Summing the values, Is it Obvious, Survival Time
Starters 107 Division 1 (Rated till 6 Stars)
Maximal Expression, Interesting Knapsack, Adjacent Flips, Odd Matrix, OR Permutation, Recover The Array
Starters 108 Division 1 (Rated till 6 Stars)
Palindromic Prime Numbers, Fair Distribution, Continuous Subarrays, Gold Rush, Multiple of 9, Move Negative Stones
Starters 109 Division 1 (Rated till 5 Stars)
Minimum XOR, Cricket World Cup Qualifier, Best of N Sets, Chef Lost an Array, Worth of a Video, Alter Ego, Chroma Swap, Rigged Game
August Long 2023 Division 1 (Unrated)
Codechef Copy, Spiritual Chef, All New CodeChef, Maximum Deliciousness, I Can Use Both Hands!
September Short 2023 Division 1 (Unrated)
GCD Discount, Ultimate Fencing, Lucky Seven, Slow Start, Mixing Extraordinaire
SQL Contest (Unrated)
First Problem on SQL, Number of Distinct Institutes, Div 2 Ranklist, Total Time, Maximum Sum Subarray - SQL
Starters 110 Division 1 (Rated till 5-stars)
Water Park, Airlines, Marbles, Am I Lucky!, Tom and Jerry, World Cup, Monsters, Tetris
Starters 111 Division 1 (Rated till 6 Stars)
LCM Mania, Prefixing, Prime Range Game, Beautiful Strings, ODI Cricket, Component Count, Square Count, 404 Not Found
Starters 112 Divison 1 (Rated till 6 Stars)
Maximise Sum, Cursed Indices, 3 Logicians Walk into a Bar, Yet Another Array Game, Minimization Game, Subtree Coloring, Permutation Construction
Starters 113 Division 1 (Rated)
Count Distinct Arrays, Counting Is Fun, Maximise The Minimum, Minimise Maximum Subarray Sum, Make All Equal, Score Sum, Maximum Score
Starters 114 Division 1 (Rated till 6 Stars)
Yet another Matrix problem, Game on Array, Chef and Tag, Rock-Paper-Scissors, Lexicographic Rook on a Graph
Starters 115 Division 1 (Rated)
Delete The Array, Subtraction Sequence I, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero
Starters 116 Divison 1 (Rated till 6-Stars)
Chef Product, ORST , Permutation Sort, Exact Savings
Starters 117 Division 1 (Rated till 5-Stars)
Equality Etiquette, Spread Spree, Stingy Arrays, Go Away, Goose!, Not Prime Permutation, Roads and Flights, Weapon Choice, Spell Shortening, Yearly Phone
Starters 118 Division 1 (Rated till 5-Stars)
Water buckets, Count Substrings, Join States, Is it uniquely decodable, Xorry 2, Xorry 1
Starters 119 Division 1 (Rated till 6-Stars)
K Odd Sum, Xorred, Unalike Gcd & Lcm, Guess Who Delivers, Luxury Inflation
Starters 120 Division 1 (Rated till 6 Stars)
Find Permutation , Minimum Operations, Construct Permutation, Trees Are Fun, Count Subarrays, Count Arrays
Starters 121 Division 1 (Rated till 6-Stars)
Frequal, The Smallest String, Colourful Balls, Split And Maximize, Caesar Cipher Lite, Magic Palindrome
Starters 122 Division 1 (Rated till 6-Stars)
Arya In Grid, Transformation Cost
Starters 123 Division 1 (Rated till 6-Stars)
Minimum And Maximum I, Yet Another Alice Bob Game, Trial of the Conqueror, Minimum And Maximum II, XOR Partition Sort
Starters 124 Division 1 (Rated till 5-Stars)
Swap and Unite, Make It One, How many arrays
Starters 125 Division 1 (Rated till 6-Stars)
Bucket Game, Lazy Rescue, Manhattan Xor, Operating on A, Binary Minimal
Starters 126 Division 1 (Rated till 6 Stars)
Remove the Peaks, Tree Distance Set, AC Please, Dice Game 3, Freedom, Sale, Uncommon Cycles, LCD, Permutation Disturbance, Triangular Swaps
Starters127 Division 1
Array Operations, Expected Components, Curse of Damyaan, Purify It, ABC Conjecture, Anti-Triangle
Starters 128 Division 1 (Rated till 6-Stars)
Binary Substring, XOR And Multiply, Counting Problem, Defeating Monsters
Starters 129 Division 1 (Rated till 5-Stars)
Palindromic Substrings, ConstructXor, SumXor, Cake Cutting
Starters 130 Division 1 ( Rated till 6-Stars)
Updating A, Make Equal, Minimize the Difference, Costly Swapping, Append Array, Good Binary String
Starters 131 Division 1 (Rated till 5 Stars)
ABC Conjecture 2, K-Closeness, Digit Space, Encrypt Value, T-Perm
Starters 132 Division 1 (Rated till 6 Stars)
ALIEN-OR, Optimal Flip, Random Array, Change Please, ICE CREAM, Goodness Over Good, MEX QUERIES , Prime Query, Mex Path, GAME 11
Starters 133 Division 1 (Rated till 6-Star)
ABC Conjecture 3, Powered Parameters, Too Far For Comfort, Too Far For Comfort (Easy Version)
Starters 134 Division 1 (Rated till 6-Stars)
Count Good RBS, Chef and Bit Tree, Origin, Prison Escape, 3out1in
Starters 135 Division 1 (Rated till 5-Stars)
Milky-Dark Chocolates, Envious Pile, Graph Cost, Limit of MEX, Change A to B
Starters 136 Division 1 ( Rated till 6-Stars )
Game On Rectangle, Lexicographically Maximal Prefix AND, Sum of Max K Subarray, Minimum Segments, Sum of Modes, Non-Zero XOR
Starters 137 Division 1 (Rated till 5-Stars)
Coprime Subarrays, Speedrun, Concat Lexmax Substrs, Double Trouble, Unusual Queries
Starters 138 Division 1 (Rated till 6-Stars)
A power B mod C , TRIPLE PRIMES, K Subarray Products, Prefix Suffix Inequality, Breezy Mode Problem, Distinct Substring
Starters 139 Division 1 (Rated till 5-Stars)
Sort Perm, Sum of N, Skill Game, Destroying Bridges Part 2
Starters 140 Division 1 (Rated till 5-Stars)
Lucky Matrix, Split Permutation, Trick Or Treat, Break The String, Tree Removal
Starters 141 Division 1 (Rated till 5-Stars)
Possible Contender, Amphibian Escape, Perfect Prefixes
Starters 142 Division 1 (Rated till 5-Stars)
Sum of Xors, Pairs Sum with Length x, Array Removal, Number Hunt
Starters 143 Division 1 (Rated till 5-Stars)
Non-Divisor Array, Max Min and Length, Spread of Ratism, Lex Min Binary String
Starters 144 Division 1 (Rated)
Counting Is Fun, Sort Lexicographically , Find P, Minimise Inversions, Largest K
Starters 145 Division 1 (Rated till 6-Stars)
Beautiful Array, Make Bob Win , Find the smallest array, Querified, Token Passing on Tree, Square String
Starters 146 Division 1 (Rated till 5 stars)
Back Front, Connect The Chains, Bouncing Ball, Permutation Construction, Binary Strings Yet Again
Starters 147 Division 1 (Rated till 5 stars)
Counting Triangles 101, K Subsequence 101, Counting is Fun 101, Truth Teller And Liars 101, Independence Day 101, Non-Primes 101, Gold Coins 101
Starters 148 Division 1 (Rated till 6 stars)
Double Trouble, Beautiful Flip, The Undisappearance, ZigZag Tree Sequences (Easy), ZigZag Tree Sequences (Hard)
Starters 149 (Rated till 5 stars)
Kill Monsters (Hard Version), Maximise Sum, Chef Loves Beautiful Strings (Hard Version), Construct Degree, Chef Loves Beautiful Strings (Easy Version)
Starters 150 (Rated till 6 stars)
Equal Pairs (Hard), Min Ops (Hard), Tree Requirements (Hard), Tree Requirements (Easy), Replacing Game
Starters 151 (rated till 5 stars)
Ball Game, Shooting (Hard), RGB Grid (Hard), Sequence Search, RGB Grid (Easy), RGB Grid (Medium)
Starters 152 (Rated till 6 stars)
Maximize Hamming Distance, Anti-Palindrome Queries
Starters 153 (Rated till 5 stars)
Another Game, Colorful Tree (Easy Version), Colorful Tree (Hard Version), Xometry (Easy Version), Xometry (Hard Version)
Starters 154 (Rated till 6 stars)
Tree Cut Xor, Count Winning Subarrays, GCD and XOR, Triangle Count (Hard), Triangle Count (Easy)
Starters 155 (Rated till 5 stars)
Numismatics, GCD to 1 (Hard), Replace With First, Replace With First Literally, Prefix Suffix Min Max, Array Concatanation
Starters 156 (Rated till 6 stars)
Keep Magnets Separated, Balance Difficulties, Interval Cliques, Partition Score
Starters 157 (Rated till 5 stars)
Small, Smaller, Smallest, MEXtreme Divisibility, Normal is Good, Unmedian, Saturated Subarrays
Starters 158 (Rated till 6 stars)
Make a Tree, Index Compression (Easy Version), Index Compression (Hard Version), Global Warming, Buying Game, Multiply 2 to Minimize
Starters 159 (Rated till 5 stars)
Crafty Coloring (Hard), Crafty Coloring (Easy), Glass Bridge (Hard), Super Hero, Random Nim, Glass Bridge (Easy), Chess Colouring, Elections
Starters 160 (Rated till 5 stars)
Palindrome Love, Modindrome, Unstable Elections, Buying Order (Easy), Buying Order (Hard)
Starters 161 (Rated)
Min-Max Game, Red-Blue Sort, The XOR Machine, One To Three, Quick Exit