Rajat De

Practice: 

Prime Generator, Factorial, Small factorials, Marbles, Ordering the Soldiers, Bytelandian gold coins, Ambiguous Permutations, Enormous Input Test, Sums in a Triangle, Turbo Sort, GCD2, Life, the Universe, and Everything, Prime Palindromes, The Lead Game, Modulo, Odd, Fibonacci, Yet Another Number Game, Flipping Coins, Multiples of 3, Cooling Pies, Holes in the text, Temple Queues, Coloring Trees, Snakes and Ladders, RectangleArea, I Spy You, Houses and Restaurants, Dynamic GCD, GM plants, Count of Maximum, Equation Solver, Algorithm Challenge, Divisor Summation, Double Strings, Divisible By 17, Little Elephant and Balance, String encryption, Closing the Tweets, Matchsticks, Racing Horses, Stick the Sticks, Pizza Delivery, Root of the Problem, Packaging Cupcakes, Three Different Numbers, A OR B, Call me, Maybe, Superpowers of 2, Andrew and the Strings, The Probability Of Winning, Maxim and Dividers, Online Shopping, Number of Factors, Prime Distance On Tree, Elephant, Crocodile, Pairwise AND sum, Matrix, Sorting, Tree, Polo the Penguin and the XOR, Polo the Penguin and the Tree, ForbiddenSum, Am I a Fibonacci Number, Funny Marbles, Perfect Subarrays, Reign 2, Mike and Matrices , Counting Matrices, Chef and Numbers, Cards, bags and coins, Interrogating Gangsters, Maximum number, GCD condition, Fun with flooring factorial, Naughty and Balls, A Story with Strings, XOR Minimization, Coin Calculator, Chef and Graph Queries, Book Game with Chef, Chef and Reversing, Chef and Frogs, Chef and Subarray, Chef and Bracket-Pairs, Shortest Path in Binary Trees, Stone, Count Substrings, Reach The Point, Lucky Fives, Counting Flags, Idols and Fans, Sherlock and the Grid, Dynamic Inversion, Subarray GCD, Subarray LCM, Lowest Common Ancestor, Copy-Paste, Sum Queries, Chef and Gift, Fombinatorial, Esya HandShake, A wolf, a sheep and cabbage, Tanu and Head-bob, Intersections, Harsh and Biscuits, 2048, Chef and easy problem, Chef and medium problem 2, Avoiding Cameras, XOR with Subset, And Tuples, Physics Class, Chef and Churu, Snakes and Ladders, Mahesh and his lost array, Chef and Apple Trees, Cascading Style Sheets, Hacker, Sereja and GCD, Most Distant Points, Petersen Graph, LARGEST RECTANGLE, Getting to X, Dividing the Students, Parenthesis with Maximum Sum Subarray, Xor Queries, Queries On Tree, Ranka, Challenge your Limits, Candidate walk, Just multiply, Anup at Amrithapuri, Long Drive, Heavy-light Decompositions, Connecting Islands, Queries on the Tree, Devu, his friends and birthday gifts, Query on Tree, Chef and the matrix queries, Maximum Flow in a Special Graph, Painting the Boxes, String Match, Another Fibonacci, Cricket Fever, Devu and most energetic minion, Chefs and Voting for best friend, Path containing K Nodes, Devu, his sister and Rangoli, Aggressive Negotiations, Longest non regular parentheses sub-sequence, Time Travelling Monster, Greedy puppy, Puppy and Palindromes, Puppy and game, Chef and Sets, The Car Trip of Sundar, Churu and lost string, Minimum Maximum, Easy Queries, Many Lists, Misha and Gym, Save the nature, Estimating progress, GCD on Tree, Second LIS, Jimma and Chingam, Line Intersections, Sereja and Pairs, Chef and Maximum Sum Matrices , Floor Distribution, Chef and Tree, Cat and Mouse, Shil and Special Xor Sum, Knapsack on Tree, Vertex Minimization, Disabling Installations, Tiptoe through the tulips, Two Closest, The potato problem, Lets Toss, Profit Maximization, Collateral Damage, Justice League Assemble, Lexcorp Interns, Love for Strings, Akhil Recovers The Lost Array, Evaluate the polynomial, Xortest Path, Alliances, Counting Games, So Close Yet So Far, Digit Longest Increasing Subsequences, Sherlock Counts Ways, Sereja and Ways in the Cube, The Counties, Fusing Weapons , Cookie Flavors, Sum and Xor, Robbery 101, Segment Queries, X-24 and his SUBSET code, Long Sandwich , Nasty Queries, Black Nodes in Subgraphs, AND Graph, Racing Refuels, BiCycles

September Cook-Off 2014, ACM-ICPC Warm up: 

Subarray GCD

October Cook-Off 2014: 

The Army, Walk on the Axis

November Cook-Off 2014: 

Brackets

December Cook-Off 2014: 

Good Joke!

September Challenge 2014: 

Chef and Left-Right, Fun with Rotation

October Challenge 2014: 

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

November Challenge 2014: 

Chef and Segment Game, Chef and Words, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, The Spelling Problem

December Challenge 2014: 

Chef Under Pressure, Alok-nath and His Sanskars, Chef and Bracket-Pairs, Kali and Devtas, XOR with Subset, Chef and Apple Trees, Sereja and GCD

Procon 2014: 

2048, Helping Sugam

December Lunchtime 2014: 

Delivery Man

TechFest 2015, Portal round: 

Marks Discrepency, Spiderman and Jumping

Codewars 2014: 

MUSICAL PROBLEM

ACM-ICPC Asia-Amritapuri Online Contest 2014, Replay: 

Mangalyaan-2

Code Zip 2014: 

Pair Stones

Code Avengers 2014, ABESEC Ghaziabad. : 

Lock Unlock, Chef and Power of 2, Jigglypuff and Songs, Easy Palindrome

Code Smart 2014: 

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

Matrix 2014: 

Tom and Jerry, Jerry and Fibonacci, Stick Game, Arithmetic puzzle

Quark CodeJam: 

Bored in Class, Lights Camera Mayhem!

Codetrix II: 

Chef and party, Gurprem and crackers, Chef and robo-arm

January Challenge 2015: 

Queries on the String, Sereja and Number Division 2, Chef and A Large Permutation, Sereja and LCM, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries

DPS Dwarka INOI practice contest 01: 

Chef and powers of 2

Aarohan 2, 2014: 

AP-GP, Dhapu and the Big Sums, Dhapu and Binary Numbers, Dhapu and Hamming Distance, Card Game, Queries, Yalin Dictionary

January Cook-Off 2015: 

Suraj goes shopping, Tojo hates probabilities

January Lunchtime 2015: 

Piece of cake

Code Niche 2015: 

Dollar Game, Name Game, False Fibonacci Series

February Challenge 2015: 

Chef and Chain, Time to Study Graphs with Chef, Chef and Strange Formula, Chef and Complex String Coverage, Chef and Strings, Let us play with rank list, Jigsaw Puzzle Solving, Chef and Equality

March Challenge 2015: 

Count Substrings, Chef and Notebooks, Chef and Problems, Sereja and Random Array, Devu and his Class, Sign Wave, Matrix

April Challenge 2015: 

Count Sequences, Chef and Array, 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, Chef and String

July Challenge 2015: 

Addition and Multiplication, Maximum Difference Walk, Sereja and Game 2, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles

August Challenge 2015: 

Way Out, Social Cluster, 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, Terrible vectors, Bank robbery, Lighthouses, Cracking the Code, Chef and Chetris

October Challenge 2015: 

Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Cyclic shifts in permutation, Rupsa and Equilateral Triangle, LCM equation, Jump mission, Efficient Delivery

November Challenge 2015: 

Ingredients, Receipt Recovery, Chef and collection of stamps, Eugene and function, Simple Sum, Chef and cakes

December Challenge 2015: 

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

February Cook-Off 2015: 

Fit Squares in Triangle, Strategy for the World Cup

March Cook-Off 2015: 

How to Minimize a String, 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: 

Strange operations

July Cook-Off 2015: 

Cops and the Thief Devu, Maximize Disjoint Pair Sum

August Cook-Off 2015: 

Chef and the XORed Number , Chef and the Wildcard Matching

September Mega Cook-Off 2015: 

Forgotten Language, Super Numbers, Stacks

October Cook-Off 2015: 

Word Stem, Almost Sorted Permutation

November Cook-Off 2015: 

Sereja and Line, Sereja and Array and Subtracting, Sereja and Tree 2

December Cook-Off 2015: 

Chef and Subarrays, Chef and Queries

February Lunchtime 2015: 

Lucky Four, The Warehouse

March Lunchtime 2015: 

Saving a gift of love, Chef Anup

April Lunchtime 2015: 

House Cleaning, Tickets

May Lunchtime 2015: 

Devu and Grapes, Devu and Manhattan Distance

June Lunchtime 2015: 

Chef and Submatrix, Chef and Two Strings

September Lunchtime 2015: 

Sum of palindromic numbers

December Lunchtime 2015: 

Ancient Berland Roads, Buying Seedlings, Distinct Codes

IIT Kanpur, Monthly Programming Contest 2015: 

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

Kurukshetra 2015: 

Thiruttu pasanga 2, Message Passing

RECursion Challenge-I: 

Cricket Tournament, Message Typing, Placements, Representative Selection, Boxing Match

Psycoders 2015: 

Dhoni and Practice Sessions, Will India Win, Sweet Deal, The Republic Day speech, Chef and Chocolates

Code.IT(101): 

Median, Exponential, Robot and Paths, Complementary Couples

Rise of AlgoManiacs: 

Chhota Bheem and the Game of Anagrams

CodeVaitam: 

Easy Mathematics , Strings vs Integers, Story of Berland, Unlucky Gambler

CodeSurf 2015: 

Lights and Switches, Interstellar and Stellar Distances, Fill The Bags

Code Brunch: 

Parking Slot, Byteland fund raiser, Bob and his girlfriend, N-Prime-Divisors, Visit the cities, Piyush and Bitwise-operation, Rising population

INOI 2015, Practice Round 3: 

Vogon Zoo, Twin Robots

Code Currents 2015: 

Jimmy is Late

Mindsweepers 2015: 

Nitesh and Moving Train, Mr IDC and his Love, Mr IDC and his Message, Codathon, Jovians from Jupiter, Alien Numbers

CodeCraft 2015 Replay: 

Count Palindromes, 3 Sorted Arrays, Count Permutations, Count Paths, Laughing Out Loud, Find P-th Number, Police Catching Thief

Execute 15.1 replay 2015: 

Goku and the Division, Mr Beans Candles, Jerry in a trap, Save Olive

IGNUS: 

Mr Ignus, Lucky Number

Abacus'15: 

Inception, The Grand Budapest Hotel, Interstellar

CodeZilla Prelims 2015: 

A Valentine Gift, Help Arshu!

CodeERA: 

Lucky Palindrome, Factorial , DIGITAL DISPLAY

JNTUV Warmup 2015: 

Factorial

./Execute 2015: 

Chefu and Billi, Vipul and Valentina

Prayaas 2015: 

Tired Knights

Code Me 15.02: 

Longest Path, Primal Function, When Bruce asks Rachel!

Codephrenia 2015: 

Prime Lines, Chef and Spooky Bottles

Code Marathon 2015: 

BIRTHDAY PARTY, SUBARRAY GCD, CHEF AND AUCTION, FUN WITH TREES, CHEF AND INCREASING SUBSEQUENCES

Divide By Zero 3.0: 

Utkarsh and LCM, Shil and the Toy Factory

DTU Programming Mania: 

Virat and Numbers, Supercup

January Long Challenge 2016: 

Sereja and Salesman, Chef and Inflation, Rupsa and the Game, Churu and Balls, Chef and Making Triples, 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, Matrix Maximum Sum

March Challenge 2016: 

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

April Challenge 2016: 

Amazing Experiment, Help Watson Escape, Fibonacci Queries, Chef and Ballons, Devu and good strings, Chef And Magical Path, Chef And Coloring, Game of snakes on a grid

June Challenge 2016: 

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

July Challenge 2016: 

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

August Challenge 2016: 

Chef and His Garden, Fighting Ebola, Chef and Circle Run, Chef and Chocolate, Chef and Round Run, Funny gnomes, Maximum Grid

September Challenge 2016: 

Chef and Friends, Dividing Machine, Chef and Matrix Division, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation

October Challenge 2016: 

Sereja and Progressions, Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Power Sums, Chef and Two String, Bear and Shuffled Points

November Challenge 2016: 

Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Kirito in Memeland, Chef and squares, Sereja and Ways in the Cube, Task for Alexey

December Challenge 2016: 

Train Partner, Kth Max Subarray, Chef and Finding Direction, Sereja and Increasing subsequence, Kirito in labyrinth, Edit Distance Revisited, Roses for Alexey, Our Base is Under Attack, Bear and Three Colours

January Cook-Off 2016: 

Chef and Destruction, Chef And Fibonacci Tree, Chef and Fruits

February Cook-Off 2016: 

Puppy and Catchers, Puppy and Board, Puppy and Sum

March Cook-Off 2016: 

Digital clock, Alternating subarray prefix

April Cook-Off 2016: 

Movie Weekend, Odd Divisors, Queries on a Binary Tree, LCP Maximization

May Cook-Off 2016: 

Phantasialand, Easy Numbers

June Cook-Off 2016: 

Sticks, Right Triangle, Cutting Cake, Chef Land, Range Minimum Queries

July Cook-Off 2016: 

Chef and Proportion, Chef and Numbers, Chef and Land, Chef and Array

August Cook-Off 2016: 

Tweedle-Dee and Tweedle-Dum , Math Hatter, Mock Turtle

September Cook-Off 2016: 

Lazy Jem, The Lost Arithmetic Sequences, Counting Strings, Find The Point

October Cook-Off 2016: 

Sherlock and the Ugly Flower, Watson asks Does Permutation Exist, ChefWatson uses Social Network

November Cook-Off 2016: 

Sebi and the highway, Sebi and the corrupt goverment

December Cook-Off 2016: 

Chef and Subset, Chef and Subarrays, Chef and Queries, Chef and Numbers

January Lunchtime 2016: 

Exponential Sub-Palindromes, Triangle Classification

February Lunchtime 2016: 

Chef and Socks, Chef and Tic-Tac-Toe, Chef and Polygons

April Lunchtime 2016: 

Maximum K Sums, Tree Coloring, Coins And Triangle

June Lunchtime 2016: 

Collisions, One more weird game, Square in numbers, Travelling in a tree

July Lunchtime 2016: 

Drumpf for President!, Lumpy - The Bus Driver, So Close Yet So Far

August Lunchtime 2016: 

Studying Alphabet, Short in Average, Product of Diameters, Lock-Free Stack

September Lunchtime 2016: 

Chef and Inequality, Chef and Tree

November Lunchtime 2016: 

Chef and his Students, Chef and Square Set, Chef and Balanced Polygons, Tom & Jerry

Amritapuri Summer Camp Final Contest 2015: 

Race Time!, Treasure Hunt

Procon 2015: 

Graph Sum, An Unfair Fair Game, Little Red Riding Hood and Convolutions, Little Red Riding Hood and Candy Factory, Range Queries

Procon Junior 2015: 

N Boy and Palingrams, Age of Ultron, Carol and Skrulls, Painting Logs, N Boy and Sum, Wolverine and XOR, Stockholm Encryption

Past ZCO Problems: 

Chewing

Divide by zero: 

Utkarsh and Tree Labeling, Same Old Matrix Problem, Utkarsh and Random Trees, Utkarsh and Sub Array Sum, Shil Loves Exclusive Or, Shil and Rasenshuriken

BYTES: 

AB and his Team, Virat and his Team, Mike and GP , Rohan And His House

Alkhwarizm 2016: 

Ilya and Sleep disorder, Naruto and Konahamaru, Vasya And Vanya Reunite, Polycarp And Love For Optics, Next Simple Task, Peter the Crazy Maths Teacher, Vasya and Little Bear, Deeply Rooted Tree in Vitaly Garden, Celebrating Brithday, Love for Strings, Vasya Loves Divisors

BIT Mesra Overnight Coding: 

Team Tryouts, Dhoni and Milk, King of Cricket, Ashwin and Kumble, The Victory Party

ProCon 2016 | Esya'16: 

Horrible Bosses, Shift and Push, Gangsters, Impressive Queries, Quadruples

January Challenge 2017: 

Capital Movement, Cats and Dogs, Sereja and Circles, Sereja and BOX, Coprime 6-tuples, Chef and Circle, Fantastic Four, Digits Cannot Separate, Reservior, Tourists in Mancunia

February Challenge 2017: 

Chef and Yoda, Eugene and big number, Primitive Queries, Interval Game, Sereja and Inversions, Chef and Triangles, Chef and his Best Friend, 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

January Cook-Off 2017: 

Matrix Transformation, Digit Longest Increasing Subsequences 2

February Cook-Off 2017: 

Download file, Mixing flavors, Chairs, Cooking Game

January Lunchtime 2017: 

Sealing up, Nothing in Common, Segment Queries

February Lunchtime 2017: 

Bear and House Queries, Bear and Milky Cookies, Bear and Bribing Tree, Bear and Oveflow Points

Past INOI Problems: 

Triathlon, Table Sum, Calvins Game, Sequence Land, Highway Bypass, Special Sums, Periodic Strings, Free ticket

April Challenge 2017: 

Chef and Digits, (CH) Serejs and Billiards, Bear and Random Grid, Chef and Divisor Tree, Stable market, Heavy-Light Decomposition, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes

May Challenge 2017: 

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

June Challenge 2017: 

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

July Challenge 2017: 

Chef and Sign Sequences, Pishty and tree, Tree Expectancy, Whats in the Name, Servers (Challenge), Calculator , IPC Trainers, Two Coins

August Long Challenge 2017: 

Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Hill Jumping, Walks on the binary tree, Palindromic Game, Mathison and the Data Warehouse (Challenge), Greedy Candidates, Strings and Graphs, Flower Pots

September Challenge 2017: 

Sereja and Commands, Sereja and Functions (Challenge), Chef and Pick Digit, Minimum Good Permutation, Sum of Cubes, Querying on a Grid, Weasel does Xor on Tree, Weasel finds Staircase, Fill The Matrix, Little Chef and Sums

October Challenge 2017: 

Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Shooting on the array, Max Mex, Chef and Horcrux, Counter Test For CHEFSUM, A Balanced Contest, (Challenge) Connecting computers, Lucky Edge

March Cook-Off 2017: 

Rainbow Graph, Meeting location, Yet Another Card Game, Increasing Xor Sequence, Safe Robot

June Cook-Off 2017: 

Ada and crayons, Knight Covering, A Study in Bake Street, SnackUp, Centeroid

July Cook-Off 2017: 

Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples, Bipartite Graph from Trees

December Cook-Off 2017: 

Minimum SubArray, Rotate Point, Beautiful Array, Football Match

March Lunchtime 2017: 

Bear and Haircut, Bear and Ladder, Bear and Species

June Lunchtime 2017: 

Maximum Unique Segment, Two Numbers, Company and Club Hierarchies

July Lunchtime 2017: 

Find the Maximum Value, Good Pairs, Travel to all Points, Divide the Set

Alkhwarizm 2017 (Rated): 

Logan and his XOR debacle, Charles and the BRUTAL subsequences, Laura and her QUERIES On Tree, Deadpool and his COOLEST Problem Ever, Professor X and Grouping of Numbers, Logan and DIGIT IMMUNE numbers

IOPC 2017 (Rated): 

The Birthday Tears, Game Of Life, Max Out, Christmas Time

Problems Authored (12)

Problems Tested (0)

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Editorials Contributed (1)