Đức Combi

• Username: 5★combi2k2
• Country:  Vietnam
• Student/Professional:Student
• Institution:High School for Gifted Students, Hanoi University of Science Vietnam
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2025 (Jul-Dec)2025 (Jan-Jun)2024 (Jul-Dec)2024 (Jan-Jun)

Rating Graph

No. of Contests Participated: 13

Current Ratings Graph Old Ratings Graph

2069 (-22)RatingProvisional
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August Challenge 2020 Division 1(2020-08-17 15:00:00)

Global Rank:   355

Cheated in:   

Ratings System Update

(2020-08-17 15:00:00)

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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2069 (-8)RatingProvisional
Rating i Provisional Rating, click to know more

August Challenge 2020 Division 1(2022-12-20 00:00:00)

Global Rank:   355

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 (13)

October Lunchtime 2017

Buggy Calculator

June Challenge 2018 Division 2

Two Flowers, Vision, Sheokand and String, Naive Chef

September Challenge 2018 Division 2

AND Square Subsegments, Sasha and Photos, Magician versus Chef, War of XORs, Chef and Adventures, Table Game, Bad Shuffle

August Lunchtime 2019 Division 2

Destroy Cells, Chef Does Coke Yet Again

September Challenge 2019 Division 2

Chef and Good Subsequences, Easy Fibonacci, Biladerim Icin, Fuzzy Linear Combinations, Doofish Set, Chef Designed a Network, Chef and Interesting Subsequences

December Challenge 2019 Division 2

Addition, That Is My Score!, Easy Subsequence Selection, Plus Multiply, Chefina and Ranges, Binary XOR

February Challenge 2020 Division 1

Chef and Railway Stations, Expected Change, No Change Required, Chef and Gordon Ramsay 2, Long Contest and Cook Off Overlaps

March Challenge 2020 Division 1

Lasers Everywhere

April Challenge 2020 Division 1

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

May Challenge 2020 Division 1

Buying a New String, Triple Sort, Chef and Bitwise Product

July Challenge 2020 Division 1

LCM Constraints, Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Weird Product

August Challenge 2020 Division 1

Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements

Total Problems Solved: 77