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Programming and DSA

Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.

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Programming and DSA

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Programming and DSA

Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.

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Practice Compete Compiler
Home » Riku Kawasaki
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Riku Kawasaki

  • 7★maroonrk
  •   Japan
  • Student
  • University of Tokyo
  • No Active Plan. View Details

Submissions Heat Map

Rating Graph

No. of Contests Participated: 38
3304 (+1)RatingProvisional
Rating i Provisional Rating, click to know more
Starters 115 Division 1 (Rated)(2024-01-03 22:30:00)
Global Rank:   2
Cheated in:   

Ratings System Update

(2024-01-03 22:30:00)
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3299 (+99)RatingProvisional
Rating i Provisional Rating, click to know more
September Lunchtime 2022 Division 1 (Rated) (Based on EJOI)(2022-12-20 00:00:00)
Global Rank:   2
Cheated in:   

Ratings System Update

(2022-12-20 00:00:00)
This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more
How the rating system works?

Learning Paths (0)

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Contests (38)

January Challenge 2021 Division 1

Cool Subsets, Curious Matrix, Chef and Ants, Guess the Tiling, Expected Number of SCCs, Blackjack, Sequence Creation, And-Or Game

December Challenge 2020 Division 1

Hail XOR, Square Root of LCA Convolution, Calculus, Linear Combination, Permutations, Digit Matrix, String Operations, Palindromic Equivalence, Positive Prefixes, Even Pair Sum

January Cook-Off 2021 Division 1

Mex Subsequence, Not Too Colourful, Partition Ways, Prefix And, Common Ancestors, Equal Gifts

December Lunchtime 2020 Division 1 (Unrated)

K-Tuple Tree, Even Sequence, Three Letters, XOR-ed Palindromes, One Zero Swaps

January Lunchtime 2021 Division 1 (Unrated)

Good Grid, Shifting Spoons, Dreams of Divisibility, Even Sum

November Lunchtime 2020 Division 2

Gasoline Introduction, Xor Compare, Gasoline, Rook Path, Fractions, Circle Coloring, Circle Eating

September Lunchtime 2020 Division 2

Permutation Split, GCD operations, Root the Tree, Robot Detector, Watermelon, Few Different Elements

March Cook-Off 2021 Division 1

Consecutive Deletions, Water Transfer, Sort String, Chef and Sorting, Hill Sequence

March Lunchtime 2021 Division 1

Node Codon, Uniform, Binary Game, Lunchtime, Prime Cycle, Gamer

May Lunchtime 2021 Division 1

Tokens On A Tree, Odd Sum Partition, Interactive MST, Similar Arrays, Total Components, K-Subarrays

June Cook-Off 2021 Division 1

Binary String on Steroids, Battle Royale, Polynomial Root

June Lunchtime 2021 Division 1

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

July Cook-Off 2021 Division 1

Beautiful Subsequence, Mod Equality, A Special Tree 2, Hidden Colored Graph, Make the Matrix Beautiful

July Lunchtime 2021 Division 1

Xor Separation, Longest Good Segment, Bad Luck, Ancient Magic

August Cook-Off 2021 Division 1

Odd Array, Different String, Maximum Tree Jumps, Chef 2 Chef, Interactive Equivalency, Clear the Array, Construct a String

September Cook-Off 2021 Division 1

Strange Queries, 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

September Lunchtime 2021 Division 1

Range Array, Interesting Representation, Subsequence LCS, Alice vs Bob Faceoff, Yet Another Shortest Path Problem, Maximizing Minimum Segment Sum

October Lunchtime 2021 Division 1

Median Rearrangement, Tree Upshot, MAX-SEG, Maximum GCD, K-th Element on Grid

SnackDown 2021 - Online Round 1A

Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Equal Beauty, Lazy Machine, Min Max LCM

SnackDown 2021 - Online Pre-Elimination

Non-Decreasing Subsequence of size K, Good ranking, Product Pain, Guests like slippers, Mega mu - 1, Mega mu - 2, Guess the row

SnackDown 2021 - Online Elimination Round (Rated for all)

One Change Subsequences, Random Convex Hull, Graduate Work Matters, Sorting Segments, Prefix Suffix LIS Constructing, Sorter Prodigy

November Lunchtime 2021 Division 1

Min-Fund Country, Min-Max Rotations, Ghost Chase, Permutation Pairs, Subarray Jumps

SnackDown 2021 - Final Round

Ones Guessing, Equal Number of Prefix Maximums, Finally, Non Ad-Hoc Problem, AND of Maximums

December Cook-Off 2021 Division 1

Binary String Game, Destructive Nim, Ticket Machine, RGB Construction, Break the Balance

December Lunchtime 2021 Division 1

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

January Cook-Off 2022 Division 1

Unreasonable Updates, Subsegment Divisibility , Merged LIS, Boring Trip, Prime Graph, Beautiful Permutation, Erase All But One

January Lunchtime 2022 Division 1

Circular Permutation Recovery, Yet Another XOR Task, Permutation XOR Sum, Permutation Deletion, Divisible Distances

February Lunchtime 2022 Division 1

Permutation Xor, Chef Cooks Permutation, Bracket Removal, Visit Them All, Chef and Mala, Magical Modulo, Magnet Sort

March Cook-Off 2022 Division 1

Secret Tree, Powers of 2, Dragonado And XOR, Flippable Points, Oh I Dont Care, Alternating Divisibility, Palindromes and Queries

March Lunchtime 2022 Division 1

Subsequence, Mathology, Sussy Rooks, Key-bored, Winter, Adjacency Love, Separate Them All

April Cook-Off 2022 Division 1

Chef Goes Shopping, Sorted Distances, Distinct Integers, Sequence Cost, Max LCA Sum

April Lunchtime 2022 Division 1(Rated)

Modular Circular Permutations, Do Not Touch the MEX!!!, Secret Machine Mania, AND Palindromes

May Cook-Off 2022 Division 1 (Rated)

Split Powers Of 2, Max Min Circle Difference, Different Subarrays Rearrange, Triple Inversions

May Lunchtime 2022 Division 1 (Rated)

Balanced 0-1 Tree, Equal After And, Rearrange Ranges, Smallest Element In Progression

July Cook-Off 2022 Division 1 (Rated)

Median Pairs, String Break, Partition Queries, Segmentation Fault, Subsequence LCM

June Cook-Off 2022 Division 1 (Rated)

Permutation Segments, Throw and Take, Simple XOR, Prefix Suffix Distinct, Split AND Sum, Max Minus Min

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, Increase to Zero

July Lunchtime 2022 Division 1 (Rated)

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

August Lunchtime 2022 Division 1 (Rated)

Sort the Array, Tree Coloring, Subtract 12 Operation, Maximal Prefix After Flip, Mex On Subtrees, MEX Permutation Difference

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

Increasing Addition, Remove Numbers, Adjacent Pairs, Where Is the Root, Longest Unfriendly Subsequence, Bounded Spanning Tree

February Cook-Off 2023 Division 1 (Rated)

Take Not Less, Alice Potter and OWL, Alice Potter and Wingardium Leviosa, Crazy Row, Alice Potter And Dumbledore Army

Starters 115 Division 1 (Rated)

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

Total Problems Solved: 290

3304
(Div 1)
★★★★★★★
CodeChef Rating (Highest Rating 3304)
  • Inactive Global Rank
  • Inactive Country Rank

Badges

Contest Contender - Silver Badge

Contest Contender - Silver Badge

Received for participating in 25 Contests

Problem Solver - Silver Badge

Problem Solver - Silver Badge

Received for solving 250 Problems

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