Prakhar

• Username: 2★darknight0409
• Country:  India
• Student/Professional:Student
• Institution:Indian Institute of Technology Delhi 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: 33

Current Ratings Graph Old Ratings Graph

1584 (+25)RatingProvisional
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June Cook-Off 2021 Division 2(2021-06-21 00:15:02)

Global Rank:   1852

Cheated in:   

Ratings System Update

(2021-06-21 00:15:02)

This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more

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1584 (-149)RatingProvisional
Rating i Provisional Rating, click to know more

June Cook-Off 2021 Division 2(2022-12-20 00:00:00)

Global Rank:   1852

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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Contests (33)

December Cook-Off 2018 Division 2

Camp Or Not

September Challenge 2018 Division 2

Magician versus Chef, Chef and Adventures, War of XORs

August Lunchtime 2018 Division 2

Chef and Problem Setting, Chef and Eid, Mix Mix Game

January Challenge 2019 Division 2

Lucky Number Game, Fancy Quotes

January Lunchtime 2019 Division 2

Distances, Rooks, The Nights Watch

February Challenge 2019 Division 2

Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef

March Challenge 2019 Division 2

Chef and a Beautiful Digit, Chef and Number Game

April Cook-Off 2019 Division 2

Pied Piper vs Hooli, Making a Meal, Chef Learning Hungarian Algorithm

April Lunchtime 2019 Division 1

Firdavs and Planet F, Minimum Sum

May Challenge 2019 Division 1

Where to Build the Roads

June Challenge 2019 Division 1

Chef and Ingredients, Sum and GCD

July Challenge 2019 Division 1

Guess the Prime!

July Lunchtime 2019 Division 1 (Unrated)

Delete a Subarray, Two-lane Road

August Challenge 2019 Division 1

Guddu and his Mother, Dilemma, Maximize an Expression

August Cook-Off 2019 Division 1

Rich Substrings, Two Circles

September Challenge 2019 Division 1

Chef Designed a Network

September Lunchtime 2019 Division 1

All Substrings, Find the Sum

November Challenge 2019 Division 1

Physical Exercise

November Cook-Off 2019 Division 2

Signature, Chef Diet

November Lunchtime 2019 Division 1

Planting Trees, Washing Windows

December Cook-Off 2019 Division 1

Xor It

December Lunchtime 2019 Division 1

The Evil Professor, Guess the number

December Challenge 2019 Division 1

Binary XOR, Sticky Notes, Addition

February Challenge 2020 Division 1

No Change Required

March Challenge 2020 Division 1

Lasers Everywhere

January Lunchtime 2020 Division 1

Under the Tunnels

Biteration #2 (Rated for Division 2)

A - Books

UWCOI 2020 (Rated for all)

Button Pairs, Find maximum in an Array

RECode 12.0 (Rated for all)

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

January Lunchtime 2021 Division 2 (Unrated)

Good Grid, Binary Subsequence, Even Differences, Even Sum

February Challenge 2021 Division 2

Frog Sort, Team Name, Maximise Function

June Cook-Off 2021 Division 2

The Wave

Total Problems Solved: 131