Nguyễn Quang Long

• Username: 5★mbfibat
• Country:  Vietnam
• Student/Professional:Professional
• Organisation:Bytedance, Inc
• 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: 34

Current Ratings Graph Old Ratings Graph

2073 (+12)RatingProvisional
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Starters 237 (Rated till 5 star)(2026-05-06 22:00:00)

Global Rank:   20

Cheated in:   

Ratings System Update

(2026-05-06 22:00:00)

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2032 (-165)RatingProvisional
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SnackDown 2021 - Online Pre-Elimination(2022-12-20 00:00:00)

Global Rank:   191

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 (34)

March Challenge 2018 DIV 2

A Big Sale, Chef and Glove

March Cook-off 2018 Division 2

Chef Goes to the Cinema, Chef Judges a Competition

June Cook-Off 2018 Division 2

Archi and Comparsion, Good Permutations

July Cook-Off 2018 Division 2

Encoding Message, OR Matrix

March Lunchtime 2018 Division 2 (Unrated)

Chef and Friends, Magic Elements

April Challenge 2018 Division 2

Workers

May Challenge 2018 Division 2

Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs

June Challenge 2018 Division 2

Naive Chef

July Challenge 2018 Division 2

Magic Set, Strike or Spare, No Strings Attached

December Challenge 2018 Division 2

Max and Electrical Panel, Chef and Interactive Contests, Chef and An Ideal Problem

November Challenge 2018 Division 2

Chef and Ridges, Chef and Difficult Contests, Chef and Happiness

June Lunchtime 2018 Division 2

Counting Pretty Numbers

July Lunchtime 2018 Division 1

Prime divisors

August Lunchtime 2018 Division 1

Chef and Eid

Code Melange (Rated)

The Deadly Sin, Candy Love

Quick Code (Rated for Division 2)

Immortal Frieza, Majin Vegeta

January Challenge 2019 Division 2

Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes

February Challenge 2019 Division 2

Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef

February Cook-Off 2019 Division 2

Max Range Queries, Chef and Secret Password, Buying New Tablet, Chef and Party

April Challenge 2019 Division 1

Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal

April Lunchtime 2019 Division 1

Dream Problem, Firdavs and Planet F, Minimum Sum

May Challenge 2019 Division 1

Ada Rooks 2, Where to Build the Roads

May Lunchtime 2019 Division 1 (Unrated)

Grid Tour, Reverse Maximisation, Abdullah and Toll Discounts

June Challenge 2019 Division 1

Lent Money, Chef and Ingredients, Chef and His Dish, Intersecting Paths, Sum and GCD, (Challenge) SnackDown 99

June Cook-Off 2019 Division 1

Ants and Anteaters, Drink Slush

July Challenge 2019 Division 1

Guess the Prime!, Circular Merging

August Challenge 2019 Division 1

Guddu and his Mother, Encoding, Dilemma, Maximize an Expression, Chef and Gordon Ramsay

September Lunchtime 2019 Division 1

Find the Sum

December Challenge 2019 Division 1

Chefina and Ranges, Binary XOR, Sticky Notes, Addition

April Challenge 2020 Division 1

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

July Challenge 2020 Division 1

Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef

SnackDown 2021 - Online Qualifiers

Lucky Number, Maximum Number Of Distinct Elements, Minimise Difference

SnackDown 2021 - Online Round 1A

Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Equal Beauty, Min Max LCM

SnackDown 2021 - Online Pre-Elimination

Non-Decreasing Subsequence of size K, Product Pain, Guests like slippers

Starters 235 (Rated till 6 star)

Sorted Groups, MEX Spectrum, Echo

Starters 237 (Rated till 5 star)

Finding All, Final Element, Subset Min Max

Total Problems Solved: 142