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Practice: 

Factorial, Small factorials, Marbles, Ambiguous Permutations, Enormous Input Test, ATM, Life, the Universe, and Everything, Paying up, Johnny and the Beanstalk, Alok-nath and His Sanskars, Chef and Reversing, Cleaning Tables, Chef and Gift, Chef and medium problem 2, The Army, Awesomeness of Strings, Maximum Average Sub-Array, Devu and Adding Two Numbers, Matrix Again, Parenthesis with Maximum Sum Subarray, Fit Squares in Triangle, Heavy-light Decompositions, Strategy for the World Cup, Devu, his friends and birthday gifts, Entrance Exam, Greedy puppy, Puppy and game, Chef and the XORed Number , Minimum Maximum

April Cook-Off 2014: 

Snape and Ladder

November Cook-Off 2014: 

Brackets

December Cook-Off 2014: 

Good Joke!

September Challenge 2014: 

Fun with Rotation

October Challenge 2014: 

Remy paints the fence, Sereja and two strings, Chef and Ground, Chef and Painting, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus

November Challenge 2014: 

Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome

December Challenge 2014: 

Chef Under Pressure, Chef and Bracket-Pairs, XOR with Subset, Chef and Apple Trees, Sereja and GCD

August Lunchtime 2014: 

Harrenhal

September Lunchtime 2014: 

Chef and easy problem, Chef and easy problem 2

November Lunchtime 2014: 

A wolf, a sheep and cabbage

TechFest 2015, Portal round: 

Marks Discrepency, Lizard pairs, Spiderman and Jumping

CodeMasters 2014: 

Archers and Pikemen, Travelling Nomad

Code Smart 2014: 

The Chef and the Books, The Chef and the field, The Chef and the Triangles, Count of Maximum, The power of powers

January Challenge 2015: 

Queries on the String, Chef and A Large Permutation, Sereja and LCM, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries

January Cook-Off 2015: 

Suraj goes shopping

January Lunchtime 2015: 

Piece of cake, Candidate walk

February Challenge 2015: 

Chef and Chain, Chef and Strange Formula, Let us play with rank list, Chef and Equality

March Challenge 2015: 

Count Substrings, Chef and Notebooks, Devu and his Class, Sign Wave

April Challenge 2015: 

Count Sequences, Chef and Interview, Broken Telephone, Inversion sorting, Division of Lands, Chef and Piano Scales

May Challenge 2015: 

Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe, Chef and Cake

June Challenge 2015: 

Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Anticommutative implication, Chef and String

July Challenge 2015: 

Addition and Multiplication, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles

August Challenge 2015: 

Way Out, Gravity Guy, Devu And Churu , Cooking Machine, Aditi and Magic Trick, Chef and insomnia

September Challenge 2015: 

Chain of Doughnuts, Nikitosh and xor, Count Steps in Matrix, Bank robbery, Lighthouses, Cracking the Code

October Challenge 2015: 

Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Cyclic shifts in permutation, Rupsa and Equilateral Triangle

November Challenge 2015: 

Eugene and function, Chef and cakes

December Challenge 2015: 

Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence, Chef and Filters

March Cook-Off 2015: 

How to Repaint a Fence

April Cook-Off 2015: 

Equality, Version Control System

May Cook-Off 2015: 

Devu and friendship testing, Devu and decorating birthday cake

June Cook-Off 2015: 

Longest non regular parentheses sub-sequence, Strange operations

July Cook-Off 2015: 

Cops and the Thief Devu, Maximize Disjoint Pair Sum

October Cook-Off 2015: 

Word Stem, Almost Sorted Permutation

February Lunchtime 2015: 

Lucky Four, The Warehouse

April Lunchtime 2015: 

House Cleaning, Tickets

May Lunchtime 2015: 

Devu and Grapes, Devu and Manhattan Distance

October Lunchtime 2015: 

emitL

November Lunchtime 2015: 

Query over Matrix, Black And White Cells

December Lunchtime 2015: 

Distinct Codes

IIT Kanpur, Monthly Programming Contest 2015: 

Little Chef and the King, Not Palindrome, Let us play with even and odd numbers

Code Brunch: 

Parking Slot, Bob and his girlfriend

INOI 2015, Practice Round 1: 

Cultural Programme, Domino Solitaire

INOI 2015, Practice Round 2: 

Glass Bead Game

IGNUS: 

Mr Ignus

January Long Challenge 2016: 

Sereja and Salesman, Chef and Inflation, Rupsa and the Game, Churu and Balls, Cyclist Race, Chef and Time Machine, Devu and Perfume

February Challenge 2016: 

Sereja and Two Lines, Chef and Strange Operations, Devu and a light discussion, Rectangles of Love, Chef-Detective

March Challenge 2016: 

Sereja and Two Strings 2, Chef And Hungry Birds, Palindromic substrings, Floor Distribution, Chef and Number Guessing, maximize the sum, Parity tree, Chef And Special Dishes

April Challenge 2016: 

Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring

May Challenge 2016: 

Forest Gathering, Chef and Big Soccer, Laddu

June Challenge 2016: 

Chef And The Hiring Event, Chef and Rectangle Array, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array

July Challenge 2016: 

Andrash and Stipendium, Chef and Segments, Chef and Tetris, Chef and Robots Competition, Chefland and Electricity

August Challenge 2016: 

Chef and Chocolate, Chef and Round Run, Funny gnomes

October Challenge 2016: 

Chef and Keyboard, Chef and Three Dogs, Chef and Two String

February Cook-Off 2016: 

Puppy and Sum

March Cook-Off 2016: 

Digital clock, Dual Nim, Alternating subarray prefix

April Cook-Off 2016: 

Movie Weekend, Odd Divisors

February Lunchtime 2016: 

Chef and Socks, Chef and Tic-Tac-Toe

CodeRush: 

Shinchan and Magical Water Buckets

QBIT15: 

Deceptive Sudz, Harmonizing Intervals, A Simple Game, Sudz and Cakes

Koder Kombat: 

Daario Attacks

Shaastra Online Programming Contest: 

Bumbling Binks

January Challenge 2017: 

Capital Movement, Cats and Dogs

February Challenge 2017: 

Eugene and big number, Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander

March Challenge 2017: 

Cooking Schedule, Completing favorite game, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix

April Challenge 2017: 

Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes

May Challenge 2017: 

Chef and Sub Array , Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers, Chef and Subsequences

June Challenge 2017: 

Chef and Prime Queries, Saboteur (Challenge), A Good Set, Cloning, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets

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