Ritul Kumar Singh

Practice: 

Modular GCD, Doubly Increasing Path, Random Game, Pied Piper vs Hooli, Guess My Age, Chef and Interesting Subsequences , How many Topics, Palindromic Tree, Tokens On A Tree, Partition Queries, Good Operations, Minimum OR Spanning Tree

Past ZCO Problems: 

Matched Brackets, Wormholes, Matched Brackets 2, Round Table, Tournament, Little Red Riding Hood, Chewing, Save Spaceman Spiff, Video Game, SUPW, Smart Phone, IPL, Break Up, Variation, Covering, Rectangle, Bookshelves, Bamboo Art, Substring Importance - ZCO 2018, Moving Intervals - ZCO 2018, Four Sum, Rays, ZCO 2019 - 1 Singing Tournament, ZCO 2019 - 2 UpDown Sequences, Weird Ordering, Interleavings and Blocks, Vacation, Messages

Past INOI Problems: 

Triathlon, Table Sum, Calvins Game, Sequence Land, Highway Bypass, Special Sums, Periodic Strings, Free ticket, Wealth Disparity, Brackets, Fence - INOI 2017, Training - INOI 2017, 2 Two Paths - INOI 2018, 1 Road Trips and Museums - INOI 2018, Processor Scheduling, Interesting Sequences, Department Strengths, 3xN Tiling, Among Us - INOI 2021, Break the string - INOI 2021, Posting, Conquest

November Lunchtime 2019 Division 2: 

Planting Trees, Pizza or Broccoli , Compress the List, Perfection

December Challenge 2019 Division 2: 

Chefina and Ranges, Plus Multiply, Binary XOR, That Is My Score!, Addition

December Lunchtime 2019 Division 2: 

The Evil Professor, Stupid Machine, Check Algorithm, Guess the number

January Challenge 2020 Division 1: 

Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English

April Challenge 2020 Division 1: 

Strange Number, Squared Subsequences, Ready Bitwise, Leaked Answers (Challenge)

January Cook-Off 2020 Division 1 : 

Chefina and Sums

April Cook-Off 2020 Division 1 : 

Simple Operations

May Cook-Off 2020 Division 1: 

Roads in Chefland

May Lunchtime 2020 Division 2: 

Weird Walk, Convert the String, Lost Weekends

ENIGMA - PLINTH'20 LNMIIT (Rated for all): 

Minion AND Range, Recruit Villagers

Shaastra Reverse Coding Open Round: 

Prison Break, The Missing Piece, Hidden Numbers

August Cook-Off 2020 Division 1 : 

Red-blue Trees, Polygon Relationship

June Cook-Off 2020 Division 2: 

Cache Hits, Per Capita Income, Max Mex

June Lunchtime 2020 Division 1: 

Maximum AND, Gold Mining, Square Submatrices

RECode 12.0 (Rated for all): 

Chef and String, Chef and Walk, Chef and Rotation, Chef and Numbers

January Cook-Off 2021 Division 1 : 

Mex Subsequence, Not Too Colourful

September Cook-Off 2021 Division 1: 

Chef and Pairwise Distances, Half Sequence, Fake Swaps

SnackDown 2021 - Online Qualifiers: 

Lucky Number

September Lunchtime 2021 Division 1: 

Interesting Representation, Alice vs Bob Faceoff

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 Round 1B: 

Insider Subsequences

SnackDown 2021 - Online Pre-Elimination: 

Non-Decreasing Subsequence of size K, 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

SnackDown 2021 - Final Round: 

Ones Guessing, Finally, Non Ad-Hoc Problem, AND of Maximums

Exun 2021-22 Division 1 (Unrated): 

Sarthak and his Magic Grid, Vedant and his Hidden Array, Aujasvit and the Circle Game, Neil and his Binary Tree, Harshikaa and the Rain

CoDeft 2.0: 

Plus Minus, Country Planning, Prefix GCD, Permutation

June Cook-Off 2022 Division 1 (Rated): 

Throw and Take, Simple XOR, Prefix Suffix Distinct, Split AND Sum

Starters 87 Division 1 (Rated till 6 Stars): 

Count the Permutations (always), Inversions of subsequences, AB plus C, One or All

Starters 88 Division 1 (Rated till 6 Stars): 

Maximum And Or, Chef and Asteroids, Minimize the Bits, Chef and Good Array

Problems Authored (3)

Problems Tested (0)

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Editorials Contributed (0)

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