Hoang Hai

• Username: 5★enrevol
• Country:  Vietnam
• Student/Professional:Student
• Institution:VNU University of Engineering and Technology, Hanoi Vietnam
• 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: 19

Current Ratings Graph Old Ratings Graph

2117 (-2)RatingProvisional
Rating i Provisional Rating, click to know more

December Challenge 2016(2016-12-12 15:00:00)

Global Rank:   341

Cheated in:   

Ratings System Update

(2016-12-12 15:00:00)

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?

2117 (-1)RatingProvisional
Rating i Provisional Rating, click to know more

December Challenge 2016(2022-12-20 00:00:00)

Global Rank:   341

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 (19)

March Challenge 2013

Approximately, Fire Escape Routes, Tourist Translations

April Challenge 2013

Little Elephant and Music, Barcelona Gameplay Tactics, Maximum Weight Difference, Levy Conjecture

May Challenge 2013

Matchsticks, Name Reduction, Your Name is Mine

June Challenge 2013

Lapindromes

May Cook-off 2013

Subtraction Game 1

September Challenge 2013

Chef and Integers

December Challenge 2013

Funny Marbles, Magic Pairs, Rectangular Queries

January Challenge 2014

Bon Appetit, Please like me, Chef and Feedback

February Challenge 2014

Little Elephant and Subarrays, Colored Array, Longest Common Pattern, Make Him Happy, Make It Zero, Draughts

March Challenge 2014

Team Split, Binary Tournament, Walk, Maximum number, GCD condition, Little Chef and Numbers, Mike and Stamps

April Challenge 2014

Cards, bags and coins, Shortest Path in Binary Trees, Divide the Tangerine, Chef and Digits, Farmer Feb, Counting Matrices

May Challenge 2014

Little Elephant and Balloons, Compilers and Parsers, Chef-jumping, Chef and Strange Matrix, Stone

June Challenge 2014

Two Companies, Guessing Game, Forgot Password, Little Elephant and Blocks, Chef and Digit Jumps, Chef and Functions, Maxim and Progressions, Chef and Subarray

July Challenge 2014

Little Elephant and Painting, Garden Game, Chef and Frogs, Chef and Rectangle Genome, Count Substrings, Reach The Point, Dish Owner

August Challenge 2014

Chef and Reversing, Chef and Gift, The Leaking Robot

April LunchTime 2014

Minimum Product, Minion Circle, Knight Fork, Tracy and Charlie

February Challenge 2015

Devu and Locks, Time to Study Graphs with Chef, Chef and Equality, Xor Matrix, Chef and Strings, Chef and Strange Formula, Chef and Chain, Let us play with rank list

March Challenge 2015

Random Number Generator, Counting on a Tree, Matrix, Sign Wave, Devu and his Class, Sereja and Random Array, Chef and Problems, Chef and Notebooks, Count Substrings

December Challenge 2016

Train Partner, Kth Max Subarray, Kirito in labyrinth, Our Base is Under Attack

Total Problems Solved: 120