Riku Kawasaki
- 7★maroonrk
Japan- Student
- University of Tokyo
- No Active Plan. View Details
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(2024-01-03 22:30:00)Ratings System Update
(2022-12-20 00:00:00)Learning Paths (0)
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Practice 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