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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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From beginner to job-ready. Explore our curated career paths designed to help you succeed in the tech industry.

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Programming and DSA

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Catalogue

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 » Aeren
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Aeren

Rookie League Rookie League
  • 7★flowerofsorrow
  •   South Korea
  • Other
  • No Active Plan. View Details

Submissions Heat Map

Rating Graph

No. of Contests Participated: 48
2570 (+35)RatingProvisional
Rating i Provisional Rating, click to know more
Starters 174 (Rated upto 2700)(2025-02-19 22:15:00)
Global Rank:   8
Cheated in:   

Ratings System Update

(2025-02-19 22:15:00)
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2493 (+66)RatingProvisional
Rating i Provisional Rating, click to know more
July Cook-Off 2022 Division 1 (Rated)(2022-12-20 00:00:00)
Global Rank:   35
Cheated in:   

Ratings System Update

(2022-12-20 00:00:00)
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Learning Paths (0)

None

Practice Paths (0)

None

Contests (48)

February Challenge 2020 Division 2

No Change Required, The Theatre Problem, School of Geometry, Hard Cash

March Challenge 2020 Division 2

Chef and DAG, XOR Engine, Ada Bishop 2, Lasers Everywhere, Lasers Everywhere Alternative, Pintu and Fruits

May Cook-Off 2020 Division 1

Chef, Chefina and Their Friendship, Chefina on a Trip, Roads in Chefland

April Lunchtime 2020 Division 2

Dot Time, Triangle Query, Another Birthday Present!, Positive Mex, Chef in Fantasy League

July Challenge 2020 Division 1

LCM Constraints, Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef, Expected Repetitions

August Challenge 2020 Division 1

Insanely Hard School Exams, Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements

July Cook-Off 2020 Division 1

What Is This, a Crossover Episode, The In-XOR-able Task, Even-tual Reduction, OR-thodox Distinction, Path-etic Products

July Lunchtime 2020 Division 1

Profitable Paths 2, Golomb Sequence, Binary Concatenation

August Lunchtime 2020 Division 1

Game on a Strip, Counting Graphs, Alien Invasion , Elevator

June Cook-Off 2020 Division 1

Per Capita Income, Checkpoints, Banned Quotient

June Lunchtime 2020 Division 1

Maximum AND, Gold Mining, Square Submatrices

October Challenge 2020 Division 1

Inversions, Positive AND, Replace for X, D-Dimensional MST, Compress all Subsegments, Adding Squares

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

January Lunchtime 2021 Division 1 (Unrated)

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

October Cook-Off 2020 Division 1

Path-etic Sums, The In-XOR-able Task, Yet Another Crossover Episode

November Cook-Off 2020 Division 1

Flip the String, Chef and IPC Certificates, Hiring Workers

October Lunchtime 2020 Division 1

Chef Likes Good Sequences, Chef Is Just Throwing Random Words, Counting Spaghetti, Cute Chef Gift

November Lunchtime 2020 Division 1

Gasoline

Coders' Legacy (Rated for all)

Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift

September Cook-Off 2020 Division 1

Joined Subarrays on Tree, Maximise Subsequence Value, Minimum Insertions

September Lunchtime 2020 Division 1

Permutation Split, Root the Tree, Robot Detector

February Challenge 2021 Division 1

Team Name, Another Tree with Number Theory, Prime Game, Multiple Games, XOR Sums, Bash Matrix, Cell Shell

March Cook-Off 2021 Division 1

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

February Lunchtime 2021 Division 1

Average Sorting, Sed Max, Chef and Reordering, Independent Set

April Cook-Off 2021 Division 1

Array and Operations, Tree Distances, OR of ANDs, Valet Parking, Deletion Sort

May Lunchtime 2021 Division 1

Tokens On A Tree, Interactive MST, 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, Node Marking, Tic Tac Toe

July Cook-Off 2021 Division 1

Beautiful Subsequence, Mod Equality, Hidden Colored Graph, Make the Matrix Beautiful

July Lunchtime 2021 Division 1

Longest Good Segment

August Cook-Off 2021 Division 1

Odd Array, Different String, Chef 2 Chef, Interactive Equivalency, Clear the Array

September Cook-Off 2021 Division 1

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

October Cook-Off 2021 Division 1

Can You Reach The End, Chef Up

October Lunchtime 2021 Division 1

Median Rearrangement, Tree Upshot

SnackDown 2021 - Online Round 1A

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

SnackDown 2021 - Online Pre-Elimination

Non-Decreasing Subsequence of size K, Good ranking, Product Pain, Guests like slippers

SnackDown 2021 - Online Elimination Round (Rated for all)

Random Convex Hull, Graduate Work Matters, Sorting Segments

December Lunchtime 2021 Division 1

Optimal Sorting, Romantic Reversals, Sleep Technique

SnackDown 2021 - Final Round Parallel Contest (Unrated)

Ones Guessing, AND of Maximums

February Cook-Off 2022 Division 1

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

April Lunchtime 2022 Division 1(Rated)

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

July Cook-Off 2022 Division 1 (Rated)

Partition Queries, Segmentation Fault, Subsequence LCM

June Lunchtime 2022 Division 1 (Rated)

Chef And Lost Array, The Lost Array, Max Shift After XOR, XOR Times 2 Is Sum, Minimum Xor On Segment

Starters 115 Division 1 (Rated)

Subtraction Sequence I, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero

Starters 120 Division 1 (Rated till 6 Stars)

Find Permutation , Minimum Operations, 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, Making Stars, Yet Another Alice Bob Game, Trial of the Conqueror, Minimum And Maximum II, XOR Partition Sort

Starters 126 Division 1 (Rated till 6 Stars)

Remove the Peaks, Tree Distance Set, Freedom, Uncommon Cycles, LCD, Triangular Swaps

Starters 128 Division 1 (Rated till 6-Stars)

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

Starters 134 Division 1 (Rated till 6-Stars)

Count Good RBS, Chef and Bit Tree, Origin, Prison Escape, 3out1in

Starters 144 Division 1 (Rated)

Find P, Minimise Inversions, Largest K

Starters 152 (Rated till 6 stars)

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

Starters 161 (Rated)

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

Starters 173 (Rated upto < 2700)

Cool Subsequences, Postman and LLM, Introverts, Cool Checker, Time Penalty, Overwrite

Starters 174 (Rated upto 2700)

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

Starters 178 (Rated till 6 star)

Smoothly Increasing , Big Difference, Count Disjoint Arrays, Reduce to Palindrome, Minimum Colours (Hard)

Starters 186 (Rated till 6 star)

XOR with Add X, Distinct Arrays , Segment Tree Reconstruction, Mod and Make Y

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

Total Problems Solved: 298

2570
(Div 1)
★★★★★★★
CodeChef Rating (Highest Rating 2575)
  • 55 Global Rank
  • 1 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

Daily Streak - Bronze Badge

Daily Streak - Bronze Badge

Received for maintaining a streak of 5 days

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