Roshan Jha

• Username: 4★noncommercial
• Country:  India
• Student/Professional:Student
• Institution:St. Thomas' College of Engineering and Technology, Kolkata, West Bengal India
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2026 (Jan-Jun)2025 (Jul-Dec)2025 (Jan-Jun)

Rating Graph

No. of Contests Participated: 7

Current Ratings Graph Old Ratings Graph

1814 (+61)RatingProvisional
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December Challenge 2020 Division 2(2020-12-14 15:00:02)

Global Rank:   755

Cheated in:   

Ratings System Update

(2020-12-14 15:00:02)

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?

1814 (+3)RatingProvisional
Rating i Provisional Rating, click to know more

December Challenge 2020 Division 2(2022-12-20 00:00:00)

Global Rank:   755

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)

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Practice Paths (0)

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Contests (7)

May Challenge 2020 Division 2

Isolation Centers, Coronavirus Spread

May Lunchtime 2020 Division 2

Weird Walk, Lost Weekends

June Challenge 2020 Division 2

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

July Challenge 2020 Division 2

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

August Challenge 2020 Division 2

Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP

November Challenge 2020 Division 2

Restore Sequence, Ada and Dishes, Magical Candy Store, Iron, Magnet and Wall

December Challenge 2020 Division 2

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

Total Problems Solved: 54