Rajat De

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

December Lunchtime 2014

Delivery Man

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

January Cook-Off 2015

Suraj goes shopping, Tojo hates probabilities

January Lunchtime 2015

Piece of cake

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

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

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

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)