Takuki Kurokawa

June Challenge 2020 Division 2

Even Matrix, The Tom and Jerry Game!, Operations on a Tuple, The Delicious Cake, Chef and Icecream, Chef and String, Chef and Price Control

March Cook-Off 2021 Division 2

Consecutive Deletions, Water Transfer, Chef and Sorting, Matrix XOR, Guess the Number

March Challenge 2021 Division 2

Interesting XOR!, College Life 4, Paparazzi Gennady, Space Arrays

March Lunchtime 2021 Division 2

Dinner by Candlelight, Racing, Node Codon, Uniform, Lunchtime, Gamer

April Lunchtime 2021 Division 1

A Special Tree, Hackerman

May Cook-Off 2021 Division 1

Permutation Swaps, Falling Zero, Double Burgers

May Lunchtime 2021 Division 1

Tokens On A Tree, Total Components, K-Subarrays

June Cook-Off 2021 Division 1

Binary String on Steroids, Battle Royale

June Lunchtime 2021 Division 1

From Rational to Binary, False Number, HTML Tags, Richie Rich, Node Marking, Tic Tac Toe, Graph Count

July Challenge 2021 Division 1 (Unrated)

XxOoRr, Chef vs Bharat, Even Odd Partition, Optimal Denomination, Chef and Pairs, Dakimakura Distribition, K Path Query

July Cook-Off 2021 Division 1

Beautiful Subsequence, Mod Equality, Hidden Colored Graph, Make the Matrix Beautiful

July Lunchtime 2021 Division 1

Xor Separation, Longest Good Segment, Bad Luck

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, Charge Scheduling, Fat Hut, Problem Difficulties, Olympics Ranking

August Cook-Off 2021 Division 1

Odd Array, Different String, Chef 2 Chef, Interactive Equivalency, Clear the Array

August Lunchtime 2021 Division 1

Bunny Hops, Min-Max Path, Just a Graph, Longest Spanning Substrings, Chef and Deque

AlgoManiac - Code For Future Division 1 (Unrated)

Overpowered Divisors, Planetary Path, Deja Vu, 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

Chef and Pairwise Distances, Half Sequence, Fake Swaps

SnackDown 2021 - Online Qualifiers

Prefix as a Substring 2, Lucky Number, Maximum Number Of Distinct Elements

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 13 Division 1 (Unrated)

Add and Divide, Maximum Light Up, Make that Array!, Prefix as a Substring, Magical Doors

CodeChef Starters 14 Division 1 (Unrated)

Odd GCD, Task Times, FIXFIX

October Challenge 2021 Division 1 (Unrated)

Longest AND Subarray, Digit Removal, MEX-OR, Yet another MEX problem

September Lunchtime 2021 Division 1

Range Array, Interesting Representation, Subsequence LCS, Alice vs Bob Faceoff, Maximizing Minimum Segment Sum

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 Lunchtime 2021 Division 1

Median Rearrangement, Tree Upshot, MAX-SEG

SnackDown 2021 - Online Round 1B

Insider Subsequences, 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

Code: Nium Challenge

Alphabet Difference, Divide Students Into Classes, Queries in an Array

CodeChef Starters 17 Division 1 (Unrated)

Binary Inversion, GCD of Prefixes, Yet Another Counting Problem, String Game, Partition It, Find the Special Node

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 Where They Get Back Together, 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, Kingdom Attack

November Lunchtime 2021 Division 1

Min-Max Rotations, 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 Lunchtime 2021 Division 1

In-tree-active Node Coloring, Optimal Sorting, Romantic Reversals, Sleep Technique , Point constraints

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, From Your GGANBU

January Long 2022 - I, Division 1 (Unrated)

Sequence Master, Generating Cycles, Retrieve back the Array, Chef and Riffles

January Long 2022 - II, Division 1 (Unrated)

Array Partition, Power Sum, Tree Master, Sum and OR, Crying Colours

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

CodeChef Starters 23 Division 1 (Unrated)

Average of Three, Chef and Profits, Subarray Mex, Maximise the Minimum, Maximising Vacations, Non Zero Subarray Xor

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)

Sequence GCD, Bitwise swaps, 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, Bracket Removal, 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)

Subarray XOR, Substring of a Substring, Count the Ones, Exact Marks, MEX on Trees

CodeChef Starters 29 Division 1 (Unrated)

Plusle and Minun on Array

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, Prefix Suffix Operations, Unbalanced Reversals, Balanced Reversals

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

CodeChef Starters 33 Division 1 (Unrated)

Max BIT Sum, Stable Mex, Array operations, Broken Life, 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, AND Palindromes

Starters 35 Division 1 (Unrated)

Help Chef, Jump to Sibling, Dark Light, Chef Find XOR Beautiful, K0KALARU47 and CP task, Concurrent Lines, Admins and Shopping, Water Requirement, Police and Thief, Jenga Night

Starters 36 Division 1(Unrated)

Maximum Value from Binary strings, Buying Sweets, Reduce to 1, Three Arrays, All Roads Lead To Rome

April Long Two 2022 Division 1 (Unrated)

Geometric Mean Inequality, Antipodal Points, Flip to Invert, Chef And Division

May Cook-Off 2022 Division 1 (Rated)

Different Subarrays Rearrange, Triple Inversions

Starters 37 Division 1 (Unrated)

Remove Balance, Dazzling Even-Odd Challenge, The Mango Truck, Roller Coaster, Beat the Average, Laptop Recommendation , Infernos, Maximum OR Minimum, Too Mean, Prefix XORs

May Long One 2022 Division 1 (Unrated)

Mystical Numbers, The Magical Stone, Alternating Diameter, Four Arrays

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

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, Subsequence-Numbers Divisible by 7, Not Tree Again!, Subarrays with length

Starters 40 Division 1 (Unrated)

The Three Bogatyrs, Max Value of MST, 7th Love, Or Permutation, Good Pairs

July Cook-Off 2022 Division 1 (Rated)

String Break, Partition Queries, Segmentation Fault, Subsequence LCM

Starters 41 Division 1 (Unrated)

Black and White, Remove and Add, Is this priority or parity!, Parity Fun, Dearrange sorting

Starters 42 Division 1 (Unrated)

Construct An Array , Sorting Array, Maximise Set Bits , Maximise Score, Minimum or Maximum

Starters 44 Division 1 (Unrated)

Palindromes Not Allowed, Alternating Strings, Atleast and Atmost, Dense Bracket Sequence

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, XOR, The Detective, SPLIT With XOR Not X

June Long Two 2022 Division 1 (Unrated)

The Subarray XOR

July Long One 2022 Division 1 (Unrated)

Expected Difference, Game of Piles Version 2

Starters 46 Division 1 (Unrated)

Prime Xor, Vowel Anxiety, Maximum Diversity, Equal Subsequences, Array sorting, Sort the String

Starters 47 Division 1 (Unrated)

Too Many LIS 2, Chef and Minimum Cost of His Tree, Copy and Push Back, Similar Heights, The XOR-OR Dilemma

July Lunchtime 2022 Division 1 (Rated)

Tree Interval Queries, Inversions Retrieval, Tree Retrieval, Binary String Happiness, Consecutive XOR, Largest Family

July Long Two 2022 Division 1 (Unrated)

Maximize Difference, Concat Sort, Sum of Product 2, Similar Subsequence

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, Sum Product Segments, Bad Tuples, Add Subtract Equalize, Average Permutation

Starters 51 Division 1 (Unrated)

Chef & Cook Game, Differentiation, Prefix Suffix And Or, Adjacent Xors, Copy and Paste, Different Medians

August Long 2022 Division 1 (Unrated)

XOR with smallest element, Hello Equation

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, 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)

Distinct Numbers, Pokemon Battles, Interesting Subarray

Starters 56 Division 1 (Unrated)

Division Sorting

September Lunchtime 2022 Division 1 (Rated) (Based on EJOI)

Increasing Addition, Where Is the Root, Longest Unfriendly Subsequence

October Long 2022 Division 1 (Unrated)

Twos and Zeros

Starters 60 Division 1 (Unrated)

Distinct Numbers, Maximum Sum, Red Green Grids, Yet Another Palindrome Problem, Tri XOR

Starters 61 Division 1 (Unrated)

Equal Inversions, Palindrome Partition, Weird Subarrays, Red Blue Flowers, Row Bombing, Subarray Removal

Starters 64 Division 1 (Rated till 5-stars)

Mario and the Broken String, Luigi and Uniformity, Range Assign, Number of Distinct Elements Minimize, Square Sort, Xor Array, Prime Factor Division, Planning the Trip, Distinct Neighbours , Distinct Colors, Water Consumption

Starters 66 Division 1 (Rated till 5-stars)

Sorting the Binary String, Good Binary Strings, Palindrome by Splitting, Connect All Cities, Palindrome In Making, Chef and Spice Grid, Just Like Mob!, Binary Battles, Squats, Minimum value of special tables, Monopoly in Chefland

Starters 69 Division 1 (Rated till 6-stars)

Passing Through!, Distinct Sequence, Longest Subarray

Starters 71 Division 1 (Unrated)

Pet Store, Flip the Prefix, Unique Mode, Instagram, Snapchat, Expected Sum, Perfect Trio, Maximizing LCS, Smallest Difference

Starters 72 Division 1 (Rated till 5-Stars)

Indivisible, Apples and oranges, N Triplets, Good Sequence, Good Arrangement, Sum it, Max Graph, 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, Hamiltonian Tree, 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, Minimum Replacement, Xor X,Get MAX, Equal Hamming Distance, Prefix Ones

Starters 76 Division 1 (Rated till 5-Stars)

Redistributing Chocolates, Read Pages, Bitwise Operations on Circle, Make Array Odd, Zero String, Expected Value, Counting Is Fun, Construct Array, 400M Race, Not Divisible

February Cook-Off 2023 Division 1 (Rated)

Take Not Less, Alice Potter And Dumbledore Army

Starters 80 Division 1 (Rated till 5 stars)

Permutation Subsequence, Three-People Contests, Prefix Permutation, Eat Rock!, Matrix Pain

Starters 84 Division 1 (Rated till 6 Stars)

MEX Sequences, SUM OR, Max count of 1, Digit Operation, Chef And Adjacent Sums

Starters 86 Division 1 (Rated for All)

Least Size, Minimum Operation, String Game , Prefix Max, Largest Y

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, Chef and Good Array, Minimum OR Spanning Tree

Starters 90 Division 1 (Rated till 6 Stars)

Chef And Partytions, 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, More Inversions, Chef Odd, Blobby Volley Scores, Bus Seat Numbering, Parking Charges, Maximum Sum Permutation

Starters 92 Division 1 (Rated till 6 Stars)

Rectangular Tiling, Dividing into Groups, A Peculiar Arrangement, Chef and Polygons, Beautification of array, Distance Coloring

Starters 93 Division 1 (Rated for All)

Thank U, Next, NASA, Greedy, Bloodline, Motive

Starters 94 Division 1 (Rated till 5 Stars)

The Gift, Gymkhana Election IIIT-A, Strange Sort, Place The Number, CodeChef Streak, Possible or Not, Search for 404, Special Operation, The Vowel Matrix, Rank Queries

Starters 95 Division 1 (Rated till 6 Stars)

Guess Game, Chef and Moves of GCD, Partition and Maximize, Boxes, Transfusion Chain, Break This Array

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

Starters 99 Division 1 (Rated till 6 Stars)

Segment Three, Maximize Ones, Musical Chairs, Two Piles, Yet Another Bitwise Problem, Exclusion-Inclusion

Starters 109 Division 1 (Rated till 5 Stars)

Minimum XOR, Chef Lost an Array, Alter Ego, Rigged Game

SQL Contest (Unrated)

First Problem on SQL, Number of Distinct Institutes, Div 2 Ranklist, Total Time, Maximum Sum Subarray - SQL

Starters 111 Division 1 (Rated till 6 Stars)

LCM Mania, Prefixing, Prime Range Game, Beautiful Strings, ODI Cricket, Component Count, Square Count

Starters 112 Divison 1 (Rated till 6 Stars)

Cursed Indices, 3 Logicians Walk into a Bar, Yet Another Array Game, Subtree Coloring, Permutation Construction

Starters 115 Division 1 (Rated)

Delete The Array, Subtraction Sequence I, Subtraction Sequence II, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero

Starters 116 Divison 1 (Rated till 6-Stars)

Chef Product, ORST , Permutation Sort, Exact Savings

Problems Authored (5)

Problems Tested (71)

Editorials Contributed (0)

No Contribution