Ishwarendra Jha

February Challenge 2021 Division 3

Maximise Function, Highest Divisor

February CodeChef Starters 2021 Division 3 (Rated)

Chef and Coupon

March Challenge 2021 Division 3

Chef and Groups, No Time to Wait

April Challenge 2021 Division 3

Chef and Dice, Valid Pair, World Record, Strong Language

April Cook-Off 2021 Division 3

Bodybuilder, Passing Marks, Chocolate Monger

April Lunchtime 2021 Division 3

Chef in Heaven , Equinox Strings, Array Rotation, Coldplay

April CodeChef Starters 2021 Division 3 (Rated)

Thief and Police, Chef On Island, Hiring Test

May Cook-Off 2021 Division 2

The Last Problem

May Lunchtime 2021 Division 2

Charges, Tom And Jerry 1

May Challenge 2021 Division 3 (Rated)

Xor Equality, Tic Tac Toe, Modular Equation, Golf, Solubility

July Cook-Off 2021 Division 2

XOR-ORED

July Lunchtime 2021 Division 2

Beautiful Pairs

August Lunchtime 2021 Division 2

K-th Maximum

CodeChef Starters 10 Division 3 (Rated)

Hardest Problem Bet, Odd Repeat, Maximise the Subsequence Sum, Remove One Element

September Cook-Off 2021 Division 2

Zebra Crossing, Fake Swaps, Adjacency Hatred

CodeChef Starters 11 Division 2 (Rated)

The Grid Fill Problem, Obtain the Sum

CodeChef Starters 13 Division 2 (Rated)

Chef in Vaccination Queue, Maximum Light Up, Magical Doors

September Lunchtime 2021 Division 2

Balanced and Unique Arrays, Yet another SOD problem

October Lunchtime 2021 Division 2

Chef and Water Car, Exactly N plus 1 Values

CodeChef Starters 17 Division 2 (Rated)

GCD of Prefixes, New Piece

C.O.D.E.R.S Division 2 (Rated)

The One On The Last Night

November Lunchtime 2021 Division 2

Expected Weight, Rapid Re-Orderings

CodeChef Starters 21 Division 2 (Rated)

Akash and Grid, ChefWM, And Or Union

CodeChef Starters 22 Division 2 (Rated)

An Interesting Sequence, Even Subset Xor, Equal LIS

January Cook-Off 2022 Division 2

Palindromes Not Allowed, Mean Maximization, Subsegment Divisibility

January Lunchtime 2022 Division 2

Subarray permutations, Prefix Zeros

CodeChef Starters 24 Division 2 (Rated)

Anti Palindrome, Avoid Contact, Yet Another Constructive Problem

February Long 2022 - I, Division 2 (Unrated)

Binary Base Basics, N Queens Puzzle Solved !

CodeChef Starters 25 Division 2 (Rated)

Building Towers, Equal MEX, Points and Lines

February Cook-Off 2022 Division 2

Perfect Permutation, PerMEXuation , Prefix Permutation

CodeChef Starters 28 Division 2 (Rated)

Permutation Xority, Count the Holidays

CodeChef Starters 29 Division 2 (Rated)

String protocol, Plusle and Minun on Array, Decomposition Reaction

CodeChef Starters 30 Division 2 (Rated)

Minimum Coloring, Gift Shop and Coupon, Balanced Reversals

March Lunchtime 2022 Division 2

Sad Splits, Winter, Adjacency Love

CodeChef Starters 32 Division 2 (Rated)

Maximize the Minimum, Finding Shoes, Training Plans, Flip Sorting

CodeChef Starters 33 Division 2 (Rated)

Distinct Dilemma, Non Adjacent Flips, Make Them Equal

CodeChef Starters 34 Division 2 (Rated)

Binary Mismatch, Average Array, Binary String Xor, Good Permutation

April Lunchtime 2022 Division 2(Rated)

Buckets Full of Candies, Pair Pain, Secret Machine Mania

Starters 41 Division 2 (Rated)

Equal Integers, Is this priority or parity!, Path Parity

June Cook-Off 2022 Division 2 (Rated)

Simple XOR, Break the Stick

Starters 42 Division 2 (Rated)

Minimum or Maximum, Divisible by 3

Starters 43 Division 2 (Rated)

Array Sorting, Make them Equal, The Optimal Pairs, Distinct Palindrome

Starters 46 Division 2 (Rated)

Prime Xor, Vowel Anxiety, Array sorting, Sort the String

Starters 47 Division 2 (Rated)

Copy and Push Back, Similar Heights, End Sorted

Starters 49 Division 2 (Rated)

Split The String, High Frequency, Monks, Valid Minimum

Starters 50 Division 2 (Rated)

Air Blimp, Permutation GCD, Sum Product Segments, Average Permutation

September Long 2022 Division 2 (Unrated)

Good Pairs

October Long 2022 Division 2 (Unrated)

Binary Substituition, Single Operation Part 1, Single Operation Part 2

Starters 70 Division 2 (Rated)

Minimum distance between 1s, Prime Reversal, Frequency Array Retrieval

Starters 82 Division 2 (Rated)

Make A-B Same, Difference Matrix, MIN To MAX

Starters 84 Division 2 (Rated)

SUM OR, Max count of 1, Digit Operation, Max Binary, Chef And Adjacent Sums

Starters 85 Division 2 (Rated)

Crazy Bishops on Chessboard, Efficient PAN Linking, Inside The Stadium, GCD Queries, TripTastic

Starters 86 Division 2 (Rated)

Minimum Operation, String Game , Largest Y, Maximise Score

Starters 87 Division 1 (Rated till 6 Stars)

Inversions of subsequences, AB plus C

Starters 88 Division 1 (Rated till 6 Stars)

Maximum And Or, Chef and Asteroids

Starters 89 Division 1 (Rated till 5 Stars)

Positive or Negative Subarrays, Subarray Removal, Two Averages

Starters 90 Division 1 (Rated till 6 Stars)

Crushed Apples and a Balance Scale, Minimum Ugliness, Sum of Goodness, Learning SQL, Printing Binary Array, Favourite Numbers, Anti Palindrome

Starters 91 Division 1 (Rated till 6 Stars)

Odd GCD Permutation, Chef Odd, Maximum Sum Permutation

Starters 92 Division 1 (Rated till 6 Stars)

Rectangular Tiling, Distance Coloring

Starters 94 Division 1 (Rated till 5 Stars)

Possible or Not, Search for 404, Special Operation, The Vowel Matrix, Rank Queries

Starters 97 Division 1 (Rated till 6 Stars)

No Palindrome, Triplets Min

Starters 99 Division 1 (Rated till 6 Stars)

Segment Three, Two Piles, Exclusion-Inclusion

Starters 103 Division 1 (Rated till 6 Stars)

Unique xor, Divisible By 8

Starters 106 Division 1 (Rated till 5 Stars)

Playing with OR, Save People, Count Possibilities, Reach Anywhere

Starters 108 Division 1 (Rated till 6 Stars)

Palindromic Prime Numbers

Starters 109 Division 2 (Rated)

Minimum XOR, Best of N Sets, Alter Ego

August Long 2023 Division 1 (Unrated)

All New CodeChef

Starters 114 Division 2 (Rated)

Rock-Paper-Scissors, Christmas Candy

Starters 115 Division 2 (Rated)

Subtraction Sequence I, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero, A PLUS B Remastered, Decorating Christmas Tree

Starters 116 Division 2 (Rated)

Chef Product, ORST , Permutation Sort, Exact Savings, Access Control

Starters 117 Division 1 (Rated till 5-Stars)

Equality Etiquette, Spread Spree, Stingy Arrays, Not Prime Permutation

Starters 119 Division 1 (Rated till 6-Stars)

K Odd Sum, Unalike Gcd & Lcm

Starters 121 Division 1 (Rated till 6-Stars)

Caesar Cipher Lite

Starters 122 Division 1 (Rated till 6-Stars)

Arya In Grid, Transformation Cost, Matrix Modulo

Starters 124 Division 1 (Rated till 5-Stars)

Swap and Unite, Make It One

Starters 137 Division 1 (Rated till 5-Stars)

Speedrun, Double Trouble

Starters 138 Division 1 (Rated till 6-Stars)

A power B mod C , TRIPLE PRIMES, K Subarray Products, Prefix Suffix Inequality, Breezy Mode Problem, Distinct Substring

Problems Authored (2)

Problems Tested (2)

Editorials Contributed (2)