shinchan

• Username: 7★shinchankosen
• Country:  Japan
• Student/Professional:Student
• Institution:Osaka University
• CodeChef Pro Plan: No Active Plan. View Details

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Last 6 Months 2026 (Jan-Jun)2025 (Jul-Dec)2025 (Jan-Jun)

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No. of Contests Participated: 10

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Starters 181 (Rated for all)(2025-04-09 22:30:00)

Global Rank:   18

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Contests (10)

Starters 122 Division 4 (Rated)

Healthy Sleep, Problem Reviews, Arya In Grid, Transformation Cost, Matrix Modulo, Elf on the Shelf, Man of the Match

Starters 125 Division 2 (Rated)

Bucket Game, Manhattan Xor, Operating on A, Fake Certificate, Binary Minimal

Starters 129 Division 1 (Rated till 5-Stars)

Palindromic Substrings, Red Blue Decomposition, ConstructXor, Cake Cutting

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, Chef and Bit Tree, Origin, Prison Escape, 3out1in

Starters 138 Division 1 (Rated till 6-Stars)

A power B mod C , TRIPLE PRIMES, K Subarray Products, Prefix Suffix Inequality, Breezy Mode Problem, Distinct Substring

Starters 140 Division 1 (Rated till 5-Stars)

Split Permutation, Trick Or Treat, Break The String, Tree Removal

Starters 142 Division 1 (Rated till 5-Stars)

Pairs Sum with Length x, 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, Square String

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, ZigZag Tree Sequences (Easy)

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)

Tree Cut Xor, Count Winning Subarrays, GCD and XOR, Triangle Count (Hard), Triangle Count (Easy)

Starters 155 (Rated till 5 stars)

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

Starters 156 (Rated till 6 stars)

Keep Magnets Separated, Balance Difficulties, Interval Cliques, Partition Score

Starters 158 (Rated till 6 stars)

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

Starters 161 (Rated)

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

Starters 173 (Rated upto < 2700)

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

Starters 174 (Rated upto 2700)

GCD Add Size, Meximal Sum, Mystic Slimes, Graph Monsters

Starters 177 (Rated till 5 star)

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

Starters 180 (Rated till 6 star)

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

Starters 181 (Rated for all)

Costly Swapping, The Best Matrix, Tree Colouring (Hard), Tree Operations (Easy), Flip Prefix

Starters 190 (Rated till 5 star)

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

Total Problems Solved: 143