CodeChef Logo CodeChef Logo
Courses

Programming and DSA

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

Career Paths

From beginner to job-ready. Explore our curated career paths designed to help you succeed in the tech industry.

Other Courses

Programming and DSA

Explore courses

Catalogue

Programming and DSA

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

Career Paths

From beginner to job-ready. Explore our curated career paths designed to help you succeed in the tech industry.

Other Courses

Explore courses
Practice Compete Compiler

Courses

Programming and DSA

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

Career Paths

From beginner to job-ready. Explore our curated career paths designed to help you succeed in the tech industry.

Other Courses

Programming and DSA

Explore courses

Catalogue

Programming and DSA

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

Career Paths

From beginner to job-ready. Explore our curated career paths designed to help you succeed in the tech industry.

Other Courses

Explore courses
Practice Compete Compiler
Home » Roger
user profile

Roger

  • 4★weng
  •   France
  • Professional
  • No Active Plan. View Details

Submissions Heat Map

Rating Graph

No. of Contests Participated: 46
1991 (+47)RatingProvisional
Rating i Provisional Rating, click to know more
September Cook-Off 2020 Division 1 (2020-09-21 00:00:00)
Global Rank:   39
Cheated in:   

Ratings System Update

(2020-09-21 00:00:00)
This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more
How the rating system works?
1991 (+22)RatingProvisional
Rating i Provisional Rating, click to know more
September Cook-Off 2020 Division 1 (2022-12-20 00:00:00)
Global Rank:   39
Cheated in:   

Ratings System Update

(2022-12-20 00:00:00)
This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more
How the rating system works?

Learning Paths (0)

None

Practice Paths (0)

None

Contests (46)

July Challenge 2017

Chef and Sign Sequences, Whats in the Name, Calculator

May Cook-off 2018 Division 1

Best Cake Ever

July Cook-Off 2018 Division 1

OR Matrix, Chef and GCD Game

August Cook-Off 2018 Division 1

GukiZ and Candies, Mixi Game

September Mega Cook-Off 2018 Division 1

Make a Permutation

October Mega Cook-Off 2018 Division 1

Binary Nim 2

May Lunchtime 2018 Division 1

Count Substrings, Shifted Palindrome, Maximum Plus

April Challenge 2018 Division 2

Chef and Array (Challenge), Weight of Numbers, Highway Crossing, Count Good Prefixes, Average of Pairs, Workers

May Challenge 2018 Division 2

Mighty Friend, Change the Signs, Minimum Deletions, Xor Again, Fake Binary Search, Dibs on Fibs

August Challenge 2018 Division 1

Coordinate Compression , Modular GCD, Lonely Cycles

September Challenge 2018 Division 1

Table Game, Bad Shuffle

December Challenge 2018 Division 1

(Challenge) Delete DAG, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR, Chef and An Ideal Problem

November Challenge 2018 Division 1

Appy Loves One, Good Median, Chef, Primes and Trees (Challenge), Magician versus Chef 2

October Challenge 2018 Division 1

Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard

July Lunchtime 2018 Division 1

Forced Particles

August Lunchtime 2018 Division 1

Chef and Eid, Mix Mix Game

September Lunchtime 2018 Division 1

Biased Judgement, Opposite Cites, Chef Restaurant

November Lunchtime 2018 Division 1

Useful Number, Maximize It, Beats and Pieces

December Lunchtime 2018 Division 1

Choosing from Buckets, Age Calculator

January Challenge 2019 Division 1

Yet Another Problem About Sequences, Different Neighbours, Distinct Pairs, Fancy Quotes

January Cook-Off 2019 Division 1

Ada School, Ada Matrix

February Challenge 2019 Division 1

Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Art of Balance

February Cook-Off 2019 Division 1

Max Range Queries, Chef and Secret Password, Chef in Evil Land, Chef and Party

March Challenge 2019 Division 1

Chef and Soccer, Cheating on Queue, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit, (Challenge) Interleaving Strings

April Challenge 2019 Division 1

Playing with Numbers, Subtree Removal

April Lunchtime 2019 Division 1

Firdavs and Planet F, Minimum Sum

May Challenge 2019 Division 1

Ada Rooks 2, Where to Build the Roads

May Cook-Off 2019 Division 1

Misha and Nice Sets, Bitsetbaba and Power Grid, Expected Xor, Searching for a Biclique

June Challenge 2019 Division 1

Lent Money, Chef and Ingredients, Sum and GCD, (Challenge) SnackDown 99

June Cook-Off 2019 Division 1

Ants and Anteaters, Drink Slush

June Lunchtime 2019 Division 1

Igzi and Burly Array

August Challenge 2019 Division 1

Guddu and his Mother, Dilemma, Maximize an Expression

October Mega Cook-Off 2019 Division 1

D-Or

November Challenge 2019 Division 1

Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, A Simple Game, Single Point of Failure, (Challenge) Coloring Triangulations

November Lunchtime 2019 Division 1

Planting Trees, Washing Windows

December Cook-Off 2019 Division 1

Xor It

December Challenge 2019 Division 1

Chefina and Ranges, Binary XOR, Sticky Notes, Addition

January Challenge 2020 Division 1

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

February Challenge 2020 Division 1

Chef and Railway Stations, No Change Required, Long Contest and Cook Off Overlaps

March Challenge 2020 Division 1

Chef and DAG, Lasers Everywhere, Lasers Everywhere Alternative

April Challenge 2020 Division 1

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

February Cook-Off 2020 Division 1

Must Be Divisible, XOR Game

March Cook-Off 2020 Division 1

Mysterious Sequence

February Lunchtime 2020 Division 1

Swapping to Palindrome, Secret Mission

June Challenge 2020 Division 1

The Tom and Jerry Game!, Covid Sampling (Challenge)

July Challenge 2020 Division 1

Missing a Point, Doctor Chef

September Cook-Off 2020 Division 1

Maximise Subsequence Value, Minimum Insertions

Total Problems Solved: 137

1991
(Div 2)
★★★★
CodeChef Rating (Highest Rating 2164)
  • Inactive Global Rank
  • Inactive Country Rank

Badges

Contest Contender - Silver Badge

Contest Contender - Silver Badge

Received for participating in 25 Contests

Problem Solver - Bronze Badge

Problem Solver - Bronze Badge

Received for solving 50 Problems

Daily Streak - Bronze Badge

Daily Streak - Bronze Badge

Received for maintaining a streak of 5 days

Recent Activity

Fetching recent activity

Workden, MNR PRIDE, 14, HAL Old Airport Rd, Domlur I Stage, 1st Stage, DOMLUR, Bengaluru, Karnataka 560071 [email protected] +91 95911 47880
Find us online

ROADMAPS

Learn Python
Learn Java
Learn C
Learn C++
Data structures and Algorithms
Competitive Programming
More Roadmaps

CAREER PATHS

React JS Developer
Full stack Developer
SQL for Data Analysis
Frontend Developer
Java Backend Developer
Data Analysis using Python
Python Backend Developer
C++ Developer
Machine Learning using Python

COMPILERS

HTML online compiler
C++ online compiler
C online compiler
Java online compiler
Python online compiler
SQL online compiler
JavaScript online compiler
React online compiler
More compilers

COMPANY

About us
For colleges
Coding Contests
Blogs
Contact us
Privacy Policy
Frequently Asked Questions

© 2025 CodeChef Inc. All rights reserved.

We use cookies to improve your experience and for analytical purposes. Read our Privacy Policy and Terms to know more. You consent to our cookies if you continue to use our website.