risujiroh
Silver League
- 7★risujiroh
Japan- Other
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Ratings System Update
(2025-07-13 23:00:00)Ratings System Update
(2022-12-20 00:00:00)Learning Paths (0)
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Practice Paths (0)
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Contests (41)
February Lunchtime 2020 Division 2
Painter Problem, At the Gates, Swapping to Palindrome, Not All Flavours, Monsters Battle, Secret Mission
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
July Lunchtime 2020 Division 1
Profitable Paths 2, Golomb Sequence, Coloured Pairings, Binary Concatenation , Pairs of Pairs
December Cook-Off 2020 Division 1
Mysterious Sequence, Self-Destructing Strings, Sed Passwords, Circle of Chaos, Carry All Fruits
January Cook-Off 2021 Division 1
Mex Subsequence, Not Too Colourful, Prefix And, Common Ancestors
December Lunchtime 2020 Division 1 (Unrated)
K-Tuple Tree, Three Letters, One Zero Swaps
Coders' Legacy (Rated for all)
Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift
September Lunchtime 2020 Division 1
Root the Tree, Robot Detector
UWCOI 2021 (Rated for all)
Organisation, City Mapping 2, Array Swaps, Efficient Delivery, Hidden Numbers, Binary Puzzle
April Cook-Off 2021 Division 1
Tree Distances, OR of ANDs, Valet Parking, Deletion Sort
April Lunchtime 2021 Division 1
A Special Tree, Magical Coins
May Lunchtime 2021 Division 1
Tokens On A Tree, 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, HTML Tags, Richie Rich, Hidden Cell, Node Marking, Tic Tac Toe
July Cook-Off 2021 Division 1
Beautiful Subsequence, Mod Equality, Hidden Colored Graph, Make the Matrix Beautiful
August Cook-Off 2021 Division 1
Odd Array, Different String, Maximum Tree Jumps, Chef 2 Chef, Interactive Equivalency, Clear the Array, Construct a String
August Lunchtime 2021 Division 1
Bunny Hops, Min-Max Path, Just a Graph, Longest Spanning Substrings, Chef and Deque
SnackDown 2021 - Online Qualifiers
Lucky Number
September Lunchtime 2021 Division 1
Range Array, Interesting Representation, Subsequence LCS, Alice vs Bob Faceoff
October Cook-Off 2021 Division 1
Can You Reach The End, Find the Modulus, Chef Up, Permutation Sorting Game
SnackDown 2021 - Online Round 1A
Round Robin Ranks , Dance Moves, Min Max LCM
SnackDown 2021 - Online Round 1B
Queens Placement , Largest Laddu, Help Nishant
SnackDown 2021 - Online Pre-Elimination
Non-Decreasing Subsequence of size K, Good ranking, Product Pain, Guests like slippers, Mega mu - 1
SnackDown 2021 - Online Elimination Round (Rated for all)
Random Convex Hull, Graduate Work Matters, Sorting Segments, Sorter Prodigy
November Lunchtime 2021 Division 1
Min-Max Rotations, Permutation Pairs, Subarray Jumps
SnackDown 2021 - Final Round
Ones Guessing, Finally, Non Ad-Hoc Problem, AND of Maximums
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 , Point constraints
January Lunchtime 2022 Division 1
Circular Permutation Recovery, Permutation XOR Sum
February Cook-Off 2022 Division 1
Xor Becoming Uncanny, Perfect Permutation, PerMEXuation , Mango Market, Slingshot
February Lunchtime 2022 Division 1
Permutation Xor, Chef Cooks Permutation, Visit Them All, Magical Modulo, Magnet Sort
March Cook-Off 2022 Division 1
Secret Tree, Dragonado And XOR, Flippable Points, Oh I Dont Care, Alternating Divisibility
March Lunchtime 2022 Division 1
Subsequence, Mathology, Sussy Rooks, Winter, Adjacency Love, Separate Them All
April Lunchtime 2022 Division 1(Rated)
Modular Circular Permutations, Do Not Touch the MEX!!!, Secret Machine Mania
May Cook-Off 2022 Division 1 (Rated)
Split Powers Of 2, Different Subarrays Rearrange, Triple Inversions
May Lunchtime 2022 Division 1 (Rated)
Balanced 0-1 Tree, Equal After And, Rearrange Ranges
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, Tree Retrieval, Binary String Happiness, Consecutive XOR, Largest Family
February Cook-Off 2023 Division 1 (Rated)
Take Not Less, Alice Potter and OWL, Alice Potter And Dumbledore Army
Starters 100 Division 1 (Rated)
Prime Permutation, Stamps 100, Concussive Sequence, Ant
Starters 113 Division 1 (Rated)
Count Distinct Arrays, Minimise Maximum Subarray Sum, Make All Equal, Score Sum, Maximum Score
Starters 115 Division 1 (Rated)
Delete The Array, Subtraction Sequence I, Subtraction Sequence II, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero
Starters 130 Division 1 ( Rated till 6-Stars)
Updating A, Make Equal, Costly Swapping, Append Array, Good Binary String
Starters 131 Division 1 (Rated till 5 Stars)
Chef needs to return some videotapes, 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, Goodness Over Good, 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 134 Division 1 (Rated till 6-Stars)
Count Good RBS
Starters 136 Division 1 ( Rated till 6-Stars )
Game On Rectangle, Lexicographically Maximal Prefix AND, Sum of Max K Subarray, 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, Cyclopian Edges, Breezy Mode Problem, Distinct Substring
Starters 140 Division 1 (Rated till 5-Stars)
Lucky Matrix, Split Permutation, Trick Or Treat, Break The String, Tree Removal
Starters 142 Division 1 (Rated till 5-Stars)
Sum of Xors, Pairs Sum with Length x, The Cards Machine, Array Removal, Number Hunt
Starters 144 Division 1 (Rated)
Counting Is Fun, Find P, Minimise Inversions, Largest K
Starters 145 Division 1 (Rated till 6-Stars)
Beautiful Array, Make Bob Win , 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)
Xor Minimization (Easy), Double Trouble, Beautiful Flip, The Undisappearance, Xor Minimization (Hard), 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), Not Equal On Tree, Replacing Game
Starters 154 (Rated till 6 stars)
Min Max Paths, Tree Cut Xor, Count Winning Subarrays, GCD and XOR, Triangle Count (Hard), Triangle Count (Easy)
Starters 156 (Rated till 6 stars)
Keep Magnets Separated, Expected Value Problem, Balance Difficulties, Interval Cliques, Partition Score
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 161 (Rated)
Easy Constructive Problem, Min-Max Game, Red-Blue Sort, The XOR Machine, One To Three, Quick Exit
Starters 165 (Rated till 6 stars)
Different Replacement, A to B, Stable Array, Sum Operations (Easy), Reverse and Alternate (Count)
Starters 167 (Rated till 5 stars)
Alternate Universe, Counting Good Numbers, Temperature Balance, Lottery Tickets, Sum Over Subarrays, Grid Construction (Even), Grid Construction (Odd)
Starters 168 (Rated till 6 stars)
GCD Partition, No Two Alike, Binary Removals, Xoperations, Equate XOR, Chef Loves Maths
Starters 169 (Rated till 5 stars)
Substring Strategy, No Palindromes, Constant Subsequence, Hamming equivalent
Starters 170 (Rated till 6 star)
Array Compression, Crazy Jumping Frogs, qUiRkY qUesTs (Easy), Simultaneous Robots, Stabilize Warwick
Starters 171 (Rated till 5 star)
Advitiya Security Vault, Strange Nim Game, Prefix OR, White Wall, Volcanic Eruption
Starters 172 (Rated till 5 stars)
Transform String, AndOr, Forgotten Permutation, Binary Trisection, Tactical Removal
Starters 173 (Rated upto < 2700)
Cool Subsequences, Postman and LLM, Introverts, Cool Checker, Min-Max Product Partition, Time Penalty, Overwrite
Starters 175 (Rated till 5 stars)
Alternate It!, Multiplexer
Starters 178 (Rated till 6 star)
Smoothly Increasing , Big Difference, Reduce to Palindrome
Starters 180 (Rated till 6 star)
Random Input Problem, Balls and Boxes, Shall we play a game, Huh, Easy, Counting Problem
Starters 183 (Rated till 6 star)
Arbitrary Shuffling, Complete MST, S to T
Starters 185 (Rated till 5 star)
Range Maximum Deconstruction (Hard), GCD Summation, Asymmetric Cookies, Array Deletion Game, Range Maximum Deconstruction (Easy)
Starters 188 (Rated till 6 star)
GCD and XOR 2 (Easy), GCD and XOR 2 (Hard), Swaps in a String, K Boxes, Inversion Queries, Yet Another Monsters Problem
Starters 193 (Rated for all)
Mex Tree (Min), Mex Tree (Max), Interactive MST, Shop Game (Easy), Add Permutation
Starters 194 (Rated for all)
Tournament Construction, Terminal States, Speedrunning (Easy), Munchys Modulo, Good Arrays (Cyclic), Good Arrays (Not Cyclic)