M Kawa

Rookie League

• Username: 6★mkawa2
• Country:  Japan
• Student/Professional:Other
• CodeChef Pro Plan: No Active Plan. View Details

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No. of Contests Participated: 50

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Starters 191 (Rated till 6 star)(2025-06-18 22:00:00)

Global Rank:   63

Cheated in:   

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Starters 69 Division 1 (Rated till 6-stars)(2022-12-20 00:00:00)

Global Rank:   108

Cheated in:   

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Contests (50)

CodeChef Starters 21 Division 3 (Rated)

Devendra and Water Sports, Akash and Grid, ChefWM, And Or Union, Covid and Theatre Tickets, Mean equals Median, The Melancholy of Problem Setter

CodeChef Starters 22 Division 2 (Rated)

An Interesting Sequence, Even Subset Xor, Merging Binary Strings, Equal LIS

CodeChef Starters 23 Division 2 (Unrated)

Average of Three, Subarray Mex, Maximising Vacations, Non Zero Subarray Xor

January Lunchtime 2022 Division 2

Subarray permutations, Prefix Zeros, Permutation XOR Sum

February Cook-Off 2022 Division 1

Xor Becoming Uncanny, Perfect Permutation, PerMEXuation , Mango Market, Slingshot

CodeChef Starters 26 Division 1 (Unrated)

Stone Game, Array Division, Careless Chef, Car or Bike, Valentine is Coming, Count the Notebooks, Hostel Room, Control the Pollution

CodeChef Starters 28 Division 1 (Unrated)

Travelling in the Graph, Permutation Xority

CodeChef Starters 30 Division 1 (Unrated)

Minimum Coloring, Maximizing LIS, Gift Shop and Coupon, Prefix Suffix Operations, Unbalanced Reversals, Balanced Reversals

CodeChef Starters 33 Division 1 (Unrated)

Make Them Equal

Starters 35 Division 1 (Unrated)

Help Chef, Jump to Sibling, Chef Find XOR Beautiful, Concurrent Lines

Starters 36 Division 1(Unrated)

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

Starters 37 Division 1 (Unrated)

Remove Balance, Dazzling Even-Odd Challenge, Beat the Average, Maximum OR Minimum, Too Mean

Starters 40 Division 1 (Unrated)

Max Value of MST, Or Permutation, Good Pairs

July Cook-Off 2022 Division 1 (Rated)

Segmentation Fault

Starters 41 Division 1 (Unrated)

Black and White, Remove and Add, Is this priority or parity!

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 , Minimum or Maximum

Starters 44 Division 1 (Unrated)

Palindromes Not Allowed, Alternating Strings, Atleast and Atmost, Too Many LIS, Dense Bracket Sequence, Biryani classes, Air Hockey, The Attack of Knight

Starters 43 Division 1 (Unrated)

Array Sorting, Make them Equal, The Optimal Pairs, Permutation AND

Starters 46 Division 1 (Unrated)

Prime Xor, Vowel Anxiety, 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

Starters 49 Division 1 (Unrated)

Students-Far From Hostel, Split The String, High Frequency, Good Indices, Monks

Starters 50 Division 1 (Unrated)

Air Blimp, Sum Product Segments, Average Permutation

Starters 54 Division 1 (Unrated)

Equal Distinct, Subarray Game, K Flip, Departments (Easy Version)

Starters 55 Division 1 (Unrated)

Non Zero Xor, Ball Sequence, Balls and Boxes, OR Tuples

Starters 56 Division 1 (Unrated)

K-Subarrays, Energetic Node(Easy Version), Energetic Node(Hard Version), Palindrome Swaps, Binary Substitution

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

Increasing Addition

Starters 57 Division 1 (Unrated)

Delicious Queries, Maximum Expression, Even Splits, 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)

K - Beautiful Permutation, Maximum Subarray , Seven-Segment Factoring, Confusing Concatenations, Alternative Sufferings

Starters 60 Division 1 (Unrated)

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

Starters 61 Division 1 (Unrated)

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

Starters 62 Division 1 (Rated for 5 & 6 stars)

Joint XOR, Disjoint XOR, Sorted Substrings, Make Multiple, Pythagorean Pair

Starters 63 Division 1 (Rated for 5 & 6 stars)

Distinct Neighbours , Maximize 1s, Count Partitions , Make Length 1, Minimum Absolute Score, Greedy Grid Moves

Starters 64 Division 1 (Rated till 5-stars)

Luigi and Uniformity, Prime Factor Division, Distinct Neighbours

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

Starters 69 Division 1 (Rated till 6-stars)

Distinct Sequence, Longest Subarray

Starters 71 Division 1 (Unrated)

Flip the Prefix, Expected Sum, Maximizing LCS, Smallest Difference

Starters 72 Division 1 (Rated till 5-Stars)

N Triplets, Good Sequence, Good Arrangement, No sequence, XOR Tree

Starters 74 Division 1 (Rated till 6-Stars)

Candies, Maximum Xor Sum, Distinct Values, Lcm hates Gcd, Minimal Inversions

Starters 75 Division 1 (Rated till 6-Stars)

Minimum Replacement, Equal Hamming Distance, Prefix Ones

Starters 76 Division 1 (Rated till 5-Stars)

Make Array Odd, Expected Value, Construct Array, Not Divisible

Starters 77 Division 1 (Rated till 5 Stars)

Yet Another XOR Sort, Sort a String, K Forests, Concat Palindrome, K Increment Palindrome, Three Numbers

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, Prefix Permutation

Starters 81 Division 1 (Unrated)

Distinct 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, Bomb Blast, TripTastic

Starters 89 Division 1 (Rated till 5 Stars)

Positive or Negative Subarrays, Subarray Removal, Two Averages, Restore Communication, Evil Infection

Starters 92 Division 1 (Rated till 6 Stars)

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

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 96 Division 1 (Rated till 5 Stars)

Swap the numbers, Mex Array

Starters 98 Division 1 (Rated till 6 Stars)

3-Blast Palindrome, Ball Distribution

Starters 99 Division 1 (Rated till 6 Stars)

Segment Three, Two Piles, Exclusion-Inclusion

Starters 102 Division 1 (Rated till 6 Stars)

Chess ELO, Parity Permutation, Light The Bulb, Chef Segment, Bit Play

Starters 104 Division 1 (Rated till 6 Stars)

Lexicographically Largest , Construct An Array, Maximise Sum

Starters 105 Division 1 (Rated till 6 Stars)

Ghoul-icious Goodies, 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, Odd Matrix, OR Permutation

Starters 109 Division 1 (Rated till 5 Stars)

Minimum XOR, Alter Ego, Chroma Swap, Rigged Game

September Short 2023 Division 1 (Unrated)

Ultimate Fencing, Lucky Seven, Slow Start

Starters 111 Division 1 (Rated till 6 Stars)

LCM Mania, Prefixing, Prime Range Game, Beautiful Strings, Component 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 113 Division 1 (Rated)

Count Distinct Arrays, 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, Chef and Tag, Rock-Paper-Scissors

Starters 117 Division 1 (Rated till 5-Stars)

Equality Etiquette, Spread Spree, Stingy Arrays, Go Away, Goose!, Not Prime Permutation

Starters 118 Division 1 (Rated till 5-Stars)

Count Substrings, Join States, Is it uniquely decodable, Xorry 2, Xorry 1

Starters 119 Division 1 (Rated till 6-Stars)

K Odd Sum, Unalike Gcd & Lcm

Starters 120 Division 1 (Rated till 6 Stars)

Find Permutation , Construct Permutation, Count Subarrays, Count Arrays

Starters 121 Division 1 (Rated till 6-Stars)

Frequal, Colourful Balls, Split And Maximize, Escape, Caesar Cipher Lite, Magic Palindrome

Starters 123 Division 1 (Rated till 6-Stars)

Minimum And Maximum I, Yet Another Alice Bob Game, Minimum And Maximum II

Starters 126 Division 1 (Rated till 6 Stars)

Tree Distance Set, Freedom, Triangular Swaps

Starters 128 Division 1 (Rated till 6-Stars)

Binary Substring, XOR And Multiply, Counting Problem, Defeating Monsters

Starters 130 Division 1 ( Rated till 6-Stars)

Updating A, Make Equal, Good Binary String

Starters 131 Division 1 (Rated till 5 Stars)

K-Closeness, Digit Space, Encrypt Value, T-Perm

Starters 132 Division 1 (Rated till 6 Stars)

ALIEN-OR, Optimal Flip, MEX QUERIES , Prime Query

Starters 133 Division 1 (Rated till 6-Star)

ABC Conjecture 3, Powered Parameters, Too Far For Comfort, Too Far For Comfort (Easy Version)

Starters 135 Division 1 (Rated till 5-Stars)

Milky-Dark Chocolates, 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, Sum of Modes

Starters 137 Division 1 (Rated till 5-Stars)

Speedrun, Double Trouble, Unusual Queries

Starters 139 Division 1 (Rated till 5-Stars)

Sort Perm, Sum of N, 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, Array Removal, Number Hunt

Starters 145 Division 1 (Rated till 6-Stars)

Beautiful Array, Make Bob Win , Square String

Starters 147 Division 1 (Rated till 5 stars)

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)

Starters 149 (Rated till 5 stars)

Kill Monsters (Hard Version), Maximise Sum, Chef Loves Beautiful Strings (Hard Version), Chef Loves Beautiful Strings (Easy Version)

Starters 150 (Rated till 6 stars)

Equal Pairs (Hard), Min Ops (Hard), Replacing Game

Starters 152 (Rated till 6 stars)

Completion (Hard), Maximize Hamming Distance, Completion (Easy), Anti-Palindrome Queries

Starters 153 (Rated till 5 stars)

Another Game, Colorful Tree (Easy Version), Xometry (Easy Version), Xometry (Hard Version)

Starters 154 (Rated till 6 stars)

Count Winning Subarrays, GCD and XOR, Triangle Count (Easy)

Starters 155 (Rated till 5 stars)

GCD to 1 (Hard), Replace With First, Replace With First Literally, Prefix Suffix Min Max, Array Concatanation

Starters 156 (Rated till 6 stars)

Balance Difficulties, Partition Score

Starters 157 (Rated till 5 stars)

Small, Smaller, Smallest, Normal is Good, Unmedian

Starters 158 (Rated till 6 stars)

Make a Tree, Global Warming, Buying Game, Multiply 2 to Minimize

Starters 159 (Rated till 5 stars)

Crafty Coloring (Hard), Crafty Coloring (Easy), Icecream and Cone, Glass Bridge (Hard), Super Hero, Random Nim, Glass Bridge (Easy), Chess Colouring, Elections, Card Game

Starters 161 (Rated)

Min-Max Game, Red-Blue Sort, One To Three, Quick Exit

Starters 162 (Rated till 5 stars)

Empty the String, MEX of XOR, Sum of Empty the String, Permutation Mod K

Starters 163 (Rated till 5 stars)

Tree Sum is Fun !, Nice Array, Sort Them, Lexio Swap

Starters 164 (Rated till 5 stars)

Halloween Array, Construct Permutation

Starters 165 (Rated till 6 stars)

A to B, Stable Array, Sum Operations (Easy)

Starters 166 (Rated till 6 stars)

Distinct Power, Divisors Array (Hard Version), Divisors Array (Easy Version), Costly Permutations, Chefland Library

Starters 169 (Rated till 5 stars)

No Palindromes, Constant Subsequence, Hamming equivalent

Starters 170 (Rated till 6 star)

Array Compression, Crazy Jumping Frogs, qUiRkY qUesTs (Easy), Simultaneous Robots

Starters 171 (Rated till 5 star)

Advitiya Security Vault, Strange Nim Game, White Wall, Volcanic Eruption

Starters 172 (Rated till 5 stars)

Transform String, AndOr

Starters 173 (Rated upto < 2700)

Cool Subsequences, Introverts, Cool Checker, Time Penalty, Overwrite

Starters 175 (Rated till 5 stars)

Alternate It!, Multiplexer

Starters 176 (Rated till 4 star)

Same And, Friendly Binary Strings, Mex-P Tree (Hard), Clothing Store, Run for Fun, Costly Summit, Mex-P Tree (Easy)

Starters 177 (Rated till 5 star)

Blocks on a Tree, Sum By OR, Flip or Reverse, Counting 01 and 10

Starters 179 (Rated till 5 star)

Product Path, Station Allocation, Can you reach

Starters 180 (Rated till 6 star)

Shall we play a game, Huh, Easy, Counting Problem

Starters 181 (Rated for all)

The Best Matrix, Tree Colouring (Hard), Flip Prefix

Starters 182 (Rated till 5 star)

MasterChef, Palindromic Score

Starters 183 (Rated till 6 star)

Arbitrary Shuffling, Complete MST, S to T

Starters 184 (Rated till 5 star)

Second MEX, Adjacent OR, Front or Back, Double or Append

Starters 189 (Rated till 5 star)

Create Binary String, Avoid Primes, Sortable Subarrays (Easy)

Starters 190 (Rated till 5 star)

Parry It! (Hard), Subsequence Sort, Min-Max Deletion

Starters 191 (Rated till 6 star)

Add 1 or 2, Coloured Array, Grid Path (Easy), Permuted Greater than 2

Total Problems Solved: 599