George Ogden

Practice: 

Pouring water, Marbles, Mixtures, Bytelandian gold coins, Turbo Sort, ATM, Life, the Universe, and Everything, The Siruseri Sports Stadium, Array Transform, Yet Another Number Game, Flipping Coins, Multiples of 3, Team Formation, Little Elephant and Alcohol, Lights, Connecting Soldiers, ChefTown Parade, Codechef Password Recovery, Jam Board, Area of Polygon, Root of the Problem, ChefGame, Three Different Numbers, Kingdom Unity, Fire Escape Routes, Galactik Football, Sereja and two strings, Number of Factors, Sereja and Graph, Circle of death, Pairwise AND sum, Chef and The Right Triangles, Kamehameha, Tree, Uncle Johny, Substring Problem, Jackpot, Perfect Subarrays, Stairway Reduction, Sequence Alignment, Chef and String, Chef and Way, Subarray Xor, Rihanna and Her Company, Little Elephant and T-Shirts, Chef and Digit Jumps, Chef and Square, Count Sequences, Dish Owner, Addition and Multiplication, Lucky Fives, Maximizing Marks, Knapsack Problem, And Operation, Shift The String, Friends, Iron Islands, Chef and medium problem 2, A Magical Length, Bye, inversions!, Mahesh and his lost array, Lost Graph, Petersen Graph, Parenthesis with Maximum Sum Subarray, Sereja and Votes, One Dimensional Kingdoms, Delivery Man, Kings Dinner, BlindDate Contest, Tour Planning, Bank and vulnerable passwords, Ingredients, The Campus chapter effect, Merge Sort, Rupsa and the Game, Longest non regular parentheses sub-sequence, Dividing Machine, Chef and Rectangle Array, Chef and collection of stamps, Churu and lost string, Sum of palindromic numbers, Cyclist Race, Creepy Bob, Acyclic Graph, Ancient Berland Roads, Urban Development, Cat and Mouse, Mike and GP , The Unforgotten Letters, Gabbar and Primes, Two Closest, Get AC in one go, Fire and Ice, Cab Service, Help with tree, Help with selection, Polygon, Rohan and new Calendar, Easy Numbers, Floor Division Game, N different palindromes, LIS and LDS, Product of Diameters, Take Turns, A friends game, The Crofts Game, Operations, Sherlock and the Ugly Flower, Chef and Roads, Query On Strings, To add or to multiply game, Move Knights, Sebi and the corrupt goverment, Maximum Xor Query, Visiting Friends, Help Deepak Find Unique Names, Fly height mode, MST Queries, Chef and Circle, Tourists in Mancunia, Miss Spaghetti and her weird queries, Currency trouble, Digit Longest Increasing Subsequences 2, Pishty and birthday, Chef the Brave Warrior, Bear and Species, Mayank and Line Segments, Snake Procession, Protecting The Poison, Hussain Set, Knight Covering, Snakes and their coup against The mongoose, Chang and the Perfect Function, Fill The Matrix, Mathison and the teleportation game, Chef Hates Palindromes, Modular GCD, A humongous Query, Area of an amazing figure, Chess knight move, Chef and Easy Problem, LOL QUERIES ON A TREE, Minions and Voting, Minion Chef and Bananas, Vision, Cut the Board, Binary Shuffle, Weak in the Middle, Family Tree, Game of Stones, MALICIOUS-MUSIC, Chef and Birthday, Minimize Digitsum, ATM Machine, Chef Restaurant , Chef and Strange Addition, Chef and Periodic Sequence, Niceness of the Arrays, Lighting Rectangle, Josephus Again, Find Best Path, Chef and Text, The Great Lane, Teddy and his Mission, Think Like An Isosceles Triangles, Special Chess-Board, Chef and strings , Friend or Girlfriend, T-Series Vs PewDiePie, Justify, Dream Problem, Must Be Divisible, Chef and DAG, Rootless Tree, Gii and His Club, Two Variables, Professor on a Trip, Two Circles, Ganesh Impresses Jojo, Hiring Chefs, Doraemon, Robots in Chefland, Servers, Banana String, Tanya and Rookie Cats (Easy Version), Tanya and Rookie Cats (Hard Version), Maximum Subsequence Sum, Profitable Paths, Chefina and Sums, Psertu in Byteland, Tunnel or Road, Ready Bitwise, Even Matrix, Sweetest Candy , THE KNIGHT, Chef and Pepperoni Pizza Again, Chocolate Day, Joined Subarrays on Tree, Triple Sort, Maximize Letter Beauty, Random Chocolates, Chef and Bitwise Product, Tower Counting, Chandler vs Joey, Inversions in Permutations, Final Exams, Bouncing Balls, Chef With Leonardo, Herbs Farming, The Tom and Jerry Game!, The Delicious Cake, Doctor Chef, Max sum Min sum, Golomb Sequence, Checkpoints, Banned Quotient, What Is This, a Crossover Episode, The In-XOR-able Task, Path-etic Products, Phoenix and Chocolates, Find XOR, Smallest KMP, C - Equal Substrings (Easy Version), D - Equal Substrings (Hard Version), C1 - Successor (Easy Version), C2 - Successor (Slightly Harder Version), Chef and Wedding Arrangements, Red-blue Trees, Cosmic Temple, Code To Get Her, Notebook Distribution, Coronavirus Spread 2, Minimum Insertions, Permutation Split, Binary String MEX, Nearest Strong City, Hail XOR, The In-XOR-able Task, Yet Another Crossover Episode, Hospital in Berland, Unusual Queries, Chef and Loss, Human Ghoul Neighbouring, Frog Sort, Captains Bottle, College Admission, Magical Bullets, Valid Sub-Sequences, Jump & Reach, Remove Sub-Array, Graph Construction, Hiring Workers, Chefland The Great City, Rook Path, Permutations, Team Name, Watching CPL, Sed Passwords, Array Swaps, Hidden Numbers, Carry All Fruits, K-Tuple Tree, Parallel Universe, Fair Elections, Rearrange the gifts, Shifting Spoons, VACCINATE HOSPITAL, Chef and Meetings, Maximum Size, Alice And The Coin Game, Greed Island Bomber, Prime Game, Chef and Spliting Strings, Prefix And, Maximise Function, Pair Me, Highest Divisor, Minimum Dual Area, Consecutive Adding, Paparazzi Gennady, Space Arrays, Sed Max, Tree paths sum, Smallest Possible Whole Number, Maximum Topological Sort, A Special Tree, Odd Array, Breaking the Fence, Market Arrangement, Water Transfer, Sort String, Boolean Game, Low Budget Sanitization, Intersection Matrix, Shortest Route, Double Burgers, Tokens On A Tree, K-Subarrays, MathBuzz, Optimal Xor Set, Minimum Subtree Cover, XxOoRr, Chef vs Bharat, Binary String on Steroids, Battle Royale, Polynomial Root, Chef and Queries, Optimal Denomination, Tic Tac Toe, Dakimakura Distribition, Different String, K Path Query, Range Array, Chef and Closure, Equal Difference, Beautiful Subsequence, Xor Separation, Positive Spewing, Longest Good Segment, Fat Hut, Clear the Array, Grid Path, Bunny Hops, Chef and Professor, Chef and Deque, Magical Flips, Maximise the Subsequence Sum, Remove One Element, Tree Distance Sum, Task Times, ATM Queue, Subsequence LCS, The Minimum Game, Make that Array!, Interesting Pairs, FIXFIX, Counting Tuples, Yet Another Counting Problem, Non-Decreasing Subsequence of size K, Subsequence, Circular Permutation Recovery, Permutation XOR Sum, Permutation Deletion, Divisible Distances, Xor Becoming Uncanny, Perfect Permutation, PerMEXuation , Mango Market, Slingshot, Permutation Xor, Chef Cooks Permutation, Visit Them All, Magical Modulo, Magnet Sort, Secret Tree, Dragonado And XOR, Flippable Points, Alternating Divisibility, Mathology, Winter, Adjacency Love, Separate Them All

October Challenge 2020 Division 2: 

Covid Run, Chef and Easy Queries

January Challenge 2021 Division 2: 

Chef and Division 3, Encoded String

December Challenge 2020 Division 1: 

Calculus, Positive Prefixes, Even Pair Sum

December Cook-Off 2020 Division 1 : 

Self-Destructing Strings, Circle of Chaos

January Cook-Off 2021 Division 2: 

Prime Tuples, Maximise Islands

December Lunchtime 2020 Division 1 (Unrated): 

Three Letters, Sed Sequences, One Zero Swaps

January Lunchtime 2021 Division 2 (Unrated): 

Good Grid, Dreams of Divisibility, Binary Subsequence, Even Differences, Even Sum

October Cook-Off 2020 Division 2: 

Split the Str Ing, Decreasing Srrnmieeda, Path-etic Sums

November Cook-Off 2020 Division 2: 

Flip the String, Chef and IPC Certificates

October Lunchtime 2020 Division 2: 

AND Plus OR

November Lunchtime 2020 Division 2: 

Gasoline Introduction, Xor Compare, Gasoline

TECHWEED: 

Guruji ka Pyaar

Codigo'21: 

Chef and Patriotic Numbers, Chef and Limbo, Chef and Invigilator , Chef and College Admisison, Republic Subarray

March Cook-Off 2021 Division 1: 

Consecutive Deletions

February Lunchtime 2021 Division 2: 

Average Sorting, Palpal Strings, Coprime Range, Independent Set

Break-The-Server (Unrated): 

PCM Dilemma, Memcached Service, Chef and Laddus For Children, Students, heights and their IQs

March Challenge 2021 Division 1: 

Interesting XOR!, Chef and Groups, No Time to Wait

March Lunchtime 2021 Division 2: 

Dinner by Candlelight, Racing, Lunchtime

April Cook-Off 2021 Division 2: 

Tree Distances, OR of ANDs, Chocolate Monger

May Cook-Off 2021 Division 1: 

The Last Problem, Marathon, Vaccine Drive, Chef and Subarrays

May Lunchtime 2021 Division 2: 

Charges, Tom And Jerry 1, Total Components

May Challenge 2021 Division 1 (Unrated): 

Valid Paths, Tree House, An Interesting Sequence, King Killing, Xor Equality, Tic Tac Toe, Modular Equation, Golf, Solubility

June Lunchtime 2021 Division 2: 

From Rational to Binary, False Number, Unpleasant Ones

August Challenge 2021 Division 2 (Unrated): 

Special Triplets, Array Filling, Geometry 1, Chef and Bulb Invention, Charge Scheduling, Chef and Digits of Large Numbers, Problem Difficulties, Olympics Ranking

August Lunchtime 2021 Division 2: 

K-th Maximum, Crossing Blocks, Just a Graph

September Challenge 2021 Division 2 (Unrated): 

XOR Equal, Shuffling Parities, Minimize Digit Sum, Treasure Hunt, 2-D Point Meeting, Airline Restrictions, Travel Pass, Covaxin vs Covishield, Minimum Digit Sum 2

September Cook-Off 2021 Division 2: 

Chef and Pairwise Distances, Zebra Crossing, Fake Swaps, Adjacency Hatred

SnackDown 2021 - Online Qualifiers: 

Lucky Number

September Lunchtime 2021 Division 2: 

Interesting Representation, Prefix Sums, Alice vs Bob Faceoff, Yet another SOD problem

October Cook-Off 2021 Division 1: 

Can You Reach The End, Find the Modulus, 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: 

Product Pain, Guests like slippers

SnackDown 2021 - Online Elimination Round (Rated for all): 

Graduate Work Matters, Sorting Segments

November Lunchtime 2021 Division 1: 

Subarray Jumps

December Cook-Off 2021 Division 1: 

Binary String Game, RGB Construction

January Cook-Off 2022 Division 1: 

Subsegment Divisibility , Merged LIS, Prime Graph, Erase All But One

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