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Programming and DSA

Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.

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Programming and DSA

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Programming and DSA

Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.

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Practice Compete Compiler
Home » Pankaj Chopra
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Pankaj Chopra

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  • 2★pankaj_chopra
  •   India
  • Professional
  • Daffodil Software Ltd.
  • No Active Plan. View Details

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No. of Contests Participated: 157
1467 (-53)RatingProvisional
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Starters 221 (Rated)(2026-01-14 22:00:04)
Global Rank:   2808
Cheated in:   

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Starters 45 Division 3 (Rated)(2022-12-20 00:00:00)
Global Rank:   1871
Cheated in:   

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Learning Paths (5)

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Learn Kotlin

55%
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Learn Go

47%
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Learn Advance Java

87%
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Java Problem Solving

58%
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Learn Java (Older version)

38%

Practice Paths (1)

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Practice for ZCO and INOI

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Contests (157)

May Challenge 2016

Chef and Balls, Laddu

June Challenge 2016

Chef And Binary Operation, Chef and Coins Game, Devu and an Array

July Challenge 2016

Andrash and Stipendium, Chefland and Electricity

August Challenge 2016

Chef and Chocolate

September Challenge 2016

Chef and digits of a number, Faded Palindromes, Chef and calculation

October Challenge 2016

Chef and Keyboard, Chef and Three Dogs

May Cook-Off 2016

Phantasialand

June Cook-Off 2016

Sticks

September Cook-Off 2016

Lazy Jem

June Lunchtime 2016

Collisions, One more weird game

January Challenge 2017

Capital Movement, Cats and Dogs, Reservior

February Challenge 2017

Chef and His Apartment Dues

March Challenge 2017

Xenny and Alternating Tasks, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix

April Challenge 2017

Similar Dishes

May Challenge 2017

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

June Challenge 2017

A Good Set, Chef and the Feast, Xenny and Coin Rankings, Pairwise union of sets

July Challenge 2017

Chef and Sign Sequences, Whats in the Name, Calculator

August Long Challenge 2017

Chef and Rainbow Array, Chef and Mover, Palindromic Game, Mathison and the Data Warehouse (Challenge), Greedy Candidates

September Challenge 2017

Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums

October Challenge 2017

Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest, (Challenge) Connecting computers

November Challenge 2017

Chef and Intersection Line, Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes

December Challenge 2017

Total Diamonds, Santa Delivering Problem, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays

June Cook-Off 2017

Ada and crayons, SnackUp

July Cook-Off 2017

Chang and Bitwise OR, Chang and the Perfect Function

August Cook-Off 2017

Real obtuse, From heaven to earth

October Cook-Off 2017

Chef and Employment Test, Chef and Weird Queries

November Cook-Off 2017

Random Pair

December Cook-Off 2017

Beautiful Array, Football Match

May Lunchtime 2017

Prefix Inversions

June Lunchtime 2017

Two Numbers

September Lunchtime 2017

Chef and Cook-Off Contests

October Lunchtime 2017

Buggy Calculator

December Lunchtime 2017

Days in Month, Strange Function

January Challenge 2018

(Challenge) Chef and Palindromes, K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

January Cook-Off 2018

Multiple of 3, Survive in ChocoLand

January Lunchtime 2018

Chef and Game with Sequence

February Challenge 2018

Chef And His Characters, Chef And The Patents, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome

February Cook-Off 2018

Chef and Cook-Off

February Lunchtime 2018

Jumping in the hills

March Challenge 2018 DIV 2

Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas, Embedding a Tree (Challenge)

March Cook-off 2018 Division 1

Chef Goes to the Cinema, Chef Restores a Matrix

April Cook-off 2018 Division 2

Cut the Board

May Cook-off 2018 Division 2

Secret Recipe

June Cook-Off 2018 Division 2

Archi and Comparsion

July Cook-Off 2018 Division 2

Encoding Message, OR Matrix

August Cook-Off 2018 Division 2

Balsa For The Three

September Mega Cook-Off 2018 Division 2

ATM Machine, Make a Permutation

December Cook-Off 2018 Division 2

Camp Or Not

April Lunchtime 2018 Division 2

Two vs Ten

May Lunchtime 2018 Division 2

Trace of Matrix, Count Substrings, Maximum Plus

April Challenge 2018 Division 1

Count Good Prefixes

May Challenge 2018 Division 2

Minimum Deletions

June Challenge 2018 Division 2

Binary Shuffle, Naive Chef

July Challenge 2018 Division 2

Magic Set, Strike or Spare

August Challenge 2018 Division 2

Modular GCD, Problem Sort, Sheokand and Number, Spell Bob

September Challenge 2018 Division 2

Magician versus Chef, War of XORs, Chef and Condition Zero (Challenge), Chef and Adventures

December Challenge 2018 Division 1

Max and Electrical Panel, Chef and An Ideal Problem

November Challenge 2018 Division 1

Appy Loves One, Chef, Primes and Trees (Challenge)

October Challenge 2018 Division 1

Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard

June Lunchtime 2018 Division 2

Summary Power, Counting Pretty Numbers

July Lunchtime 2018 Division 2

Split Stones

August Lunchtime 2018 Division 2

Chef and Problem Setting, Chef and Eid

September Lunchtime 2018 Division 2

Judging Delay, Opposite Cites, Chef Restaurant

October Lunchtime 2018 Division 1

Coloring the Grid, Weird Question

December Lunchtime 2018 Division 2

Print Pattern, Age Calculator

January Challenge 2019 Division 2

Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, (Challenge) Chef and Matching Game, A Pizza Slice

January Cook-Off 2019 Division 1

Ada School

January Lunchtime 2019 Division 2

Rooks, The Nights Watch

February Challenge 2019 Division 1

Manhattan Rectangle, Guess It Right, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Deputy Chef

February Cook-Off 2019 Division 1

Chef and Party

March Challenge 2019 Division 2

Chef and Number Game, Chef and a Beautiful Digit

March Lunchtime 2019 Division 2

Testing Robot, Pogo Stick Competition

April Challenge 2019 Division 2

Friend or Girlfriend, Maximum Remaining, Fencing

April Lunchtime 2019 Division 2

Attendance, Fast Food

May Challenge 2019 Division 2

Matches, Reduce to One

May Lunchtime 2019 Division 2 (Unrated)

Dummy Palindromic Strings, Reverse Maximisation, CV

June Challenge 2019 Division 2

Road Signs, Chef and Proxy, Lent Money, Guddu on a Date, Chef and Ingredients, Sum and GCD, (Challenge) SnackDown 99

July Challenge 2019 Division 2

Minimum and Maximum, Chef and Mean

July Lunchtime 2019 Division 2

Easy Math

August Challenge 2019 Division 2

Dilemma, Football, Distribute Apples, Zombie and the Caves

August Cook-Off 2019 Division 2

Chef and Pepperoni Pizza, Chef Drinks Coke

November Challenge 2019 Division 2

Weapon Value

January Challenge 2020 Division 2

Chef and Dynamo, Breaking Bricks

February Challenge 2020 Division 2

School of Geometry

March Challenge 2020 Division 2

Pintu and Fruits

April Challenge 2020 Division 2

Strange Number, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue

May Challenge 2020 Division 2

Triple Sort, Coronavirus Spread, Isolation Centers

April Cook-Off 2020 Division 2

Lift Requests

May Cook-Off 2020 Division 2

Chef and Recipe

April Lunchtime 2020 Division 2

Chef in Fantasy League

May Lunchtime 2020 Division 2

Weird Walk, Lost Weekends

June Challenge 2020 Division 2

Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Covid Sampling (Challenge), Chef and String, Chef and Price Control

July Challenge 2020 Division 2

Ada King, Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings

August Challenge 2020 Division 1

Smallest KMP

September Challenge 2020 Division 2

A Problem on Sticks

July Cook-Off 2020 Division 1

Even-tual Reduction, OR-thodox Distinction

August Cook-Off 2020 Division 2

Chef and Work

August Lunchtime 2020 Division 2

Mode of Frequencies

June Cook-Off 2020 Division 2

Cache Hits, Max Mex

June Lunchtime 2020 Division 2

Chef and Demonetisation

October Challenge 2020 Division 2

Positive AND, Replace for X, Covid Run, Chef and Easy Queries

November Challenge 2020 Division 2

Restore Sequence, Ada and Dishes

January Challenge 2021 Division 2

Watching CPL, Fair Elections

December Challenge 2020 Division 2

Hail XOR, Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution

December Cook-Off 2020 Division 2

Self-Destructing Strings, Catch the Thief, Minimum Attendance Requirement

January Cook-Off 2021 Division 2

Prime Tuples

December Lunchtime 2020 Division 2 (Unrated)

Sed Sequences, One Zero Swaps

January Lunchtime 2021 Division 2 (Unrated)

Binary Subsequence, Even Differences, Even Sum

October Cook-Off 2020 Division 2

Split the Str Ing, Decreasing Srrnmieeda, Path-etic Sums

November Cook-Off 2020 Division 2

Flip the String, Chef and IPC Certificates

October Lunchtime 2020 Division 2

AND Plus OR

November Lunchtime 2020 Division 2

Gasoline Introduction

Coders' Legacy (Rated for all)

Chef vs Doof, Doof on Cartesian, Doof fires Brackets

September Cook-Off 2020 Division 2

Bowling Strategy

September Lunchtime 2020 Division 2

GCD operations, Watermelon

UWCOI 2021 (Rated for all)

Array Swaps, Hidden Numbers

February Challenge 2021 Division 2

Frog Sort, Team Name, Maximise Function

March Cook-Off 2021 Division 3

Pawri Meme, Weight Balance, Guess the Number

February Lunchtime 2021 Division 2

Palpal Strings, Coprime Range

March Lunchtime 2021 Division 3

Turn It, Dinner by Candlelight, Motivation, Make the Sum Even, Racing

April Challenge 2021 Division 2

Chef and Dice

April Cook-Off 2021 Division 2

Chocolate Monger

May Cook-Off 2021 Division 3

Marathon, Vaccine Drive

May Lunchtime 2021 Division 2

Charges, Tom And Jerry 1, Total Components

May CodeChef Starters 2021 Division 3 (Rated)

Cheating Time, Plagiarism, Lazy Chef, Correct Sentence

May Challenge 2021 Division 3 (Rated)

Xor Equality, Tic Tac Toe, Golf, Solubility

June Challenge 2021 Division 2 (Unrated)

Summer Heat

June Lunchtime 2021 Division 2

False Number

July Challenge 2021 Division 3 (Rated)

XxOoRr, Chef vs Bharat, Optimal Denomination, Maximum Production, Relativity, K Path Query

July Lunchtime 2021 Division 2

Beautiful Pairs

August Challenge 2021 Division 2 (Unrated)

Special Triplets, Array Filling, Chef and Bulb Invention, Problem Difficulties, Olympics Ranking

September Challenge 2021 Division 2 (Unrated)

XOR Equal, Shuffling Parities, Airline Restrictions, Travel Pass

September Cook-Off 2021 Division 2

Zebra Crossing, Fake Swaps, Adjacency Hatred

SnackDown 2021 - Online Qualifiers

Lucky Number, Maximum Number Of Distinct Elements

CodeChef Starters 12 Division 2 (Unrated)

Make it Divisible, Maximum Points

CodeChef Starters 14 Division 2 (Unrated)

Odd GCD, Diagonal movement

October Challenge 2021 Division 2 (Unrated)

Longest AND Subarray, Digit Removal, MEX-OR, Three Boxes, Which Mixture

September Lunchtime 2021 Division 2

Balanced and Unique Arrays, Yet another SOD problem

CodeChef Starters 16 Division 2 (Unrated)

Professor And Directions

October Cook-Off 2021 Division 2

Odd Sum, 01 Subsequence

October Lunchtime 2021 Division 2

Exactly N plus 1 Values

SnackDown 2021 - Online Round 1A

Round Robin Ranks , Dance Moves, Equal Beauty, Min Max LCM

November Challenge 2021 Division 2 (Unrated)

Xor Equation, Weird Palindrome Making, Hill Sequence, Equal Coins, Maximise the bridges

SnackDown 2021 - Online Pre-Elimination

Product Pain

Code: Nium Challenge

Alphabet Difference, Divide Students Into Classes

November Lunchtime 2021 Division 2

Expected Weight, Rapid Re-Orderings

December Challenge 2021 Division 2 (Unrated)

Valleys and Hills, List of Lists

SnackDown 2021 - Elimination Parallel (Rated for Div 2)

Yet another subarray problem, Remove Element, Maximum Palindrome

February Long 2022 - I, Division 2 (Unrated)

N Queens Puzzle Solved !

February Lunchtime 2022 Division 2

Four Equidistant Points on a Grid, Parallel Processing

March Long One 2022, Division 2 (Unrated)

Akash and Function, Subarray XOR, Substring of a Substring, Exact Marks

CodeChef Starters 29 Division 2 (Rated)

String protocol, Plusle and Minun on Array, Decomposition Reaction

March Cook-Off 2022 Division 2

Janmansh at Fruit Market

CodeChef Starters 31 Division 2 (Rated)

Alternating String, Sign Moves, The Unchanging OR

CodeChef Starters 33 Division 2 (Rated)

Non Adjacent Flips, Make Them Equal

April Long One 2022, Division 3 (Rated)

Dazzling GCD Pair, Dazzling AXNODR Challenge , The Cooler Dilemma 2

April Lunchtime 2022 Division 3(Rated)

Mario and Bullet

Starters 35 Division 4 (Rated)

Dark Light, Water Requirement, Police and Thief, Jenga Night

April Long Two 2022 Division 4 (Rated)

Geometric Mean Inequality, Sasta Shark Tank, Akash and Equal Mean, Six Friends, Best Coupon, Pseudo Sorted Array

May Cook-Off 2022 Division 4 (Rated)

Chef and Gym, Chef and Masks, Farmers League, Game of Pooks

Starters 37 Division 4 (Rated)

The Mango Truck, Roller Coaster, Beat the Average, Laptop Recommendation , Infernos, Maximum OR Minimum

May Long One 2022 Division 4 (Rated)

Mystical Numbers, Pushpa , Sugarcane Juice Business, The Attack of Queen, Football Cup, Miami GP

Starters 38 Division 3 (Rated)

Dominant Army, Circular Track

Starters 39 Division 3 (Rated)

Compress the Video, Closest Vowels, Recent contest problems, A or B

Starters 41 Division 3 (Rated)

Equal Integers, Determine the Winner

Starters 42 Division 4 (Rated)

Minimum or Maximum, Divisible by 3, How Many Maximums, Age Limit, Equal Distribution, Minimum number of Flips

June Long One 2022 Division 3 (Rated)

Subscriptions, Divisible by i , Possible GCD, Alternate Additions, Equal Strings

June Long Two 2022 Division 3 (Rated)

Count the ACs, Make all equal using Pairs, Complementary Strand in a DNA

Starters 45 Division 3 (Rated)

Chef and his Apps, Change Row and Column Both

Starters 94 Division 3 (Rated)

Gymkhana Election IIIT-A, CodeChef Streak, Possible or Not

Starters 98 Division 3 (Rated)

3-Blast Palindrome, FIND A and B, Airport Management, Ball Distribution

Starters 220 (Rated)

Front-Back Matching

Starters 221 (Rated)

Odd String, Winter is Coming

Total Problems Solved: 1015

1467
(Div 3)
★★
CodeChef Rating (Highest Rating 1867)
  • 31761 Global Rank
  • 29394 Country Rank

Skill tests

100%

Java Skill test

Attempted on March 2025
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Badges

Contest Contender -  Diamond Badge

Contest Contender - Diamond Badge

Received for participating in 100 Contests

Problem Solver - Diamond Badge

Problem Solver - Diamond Badge

Received for solving 1000 Problems

Daily Streak - Gold Badge

Daily Streak - Gold Badge

Received for maintaining a streak of 50 days

Certificates

Learn Advance Java

Issued July 2023

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Learn C# - Pro

Issued June 2023

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Java for problem solving - 1

Issued June 2023

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