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Programming and DSA

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Practice Compete Compiler
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Courses

Programming and DSA

Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.

Career Paths

From beginner to job-ready. Explore our curated career paths designed to help you succeed in the tech industry.

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Programming and DSA

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Catalogue

Programming and DSA

Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.

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Practice Compete Compiler
Home » Andrey Efremov
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Andrey Efremov

  • 6★andrey_efremov
  •   Russia
  • Student
  • Saint Petersburg State University
  • No Active Plan. View Details

Submissions Heat Map

Rating Graph

No. of Contests Participated: 33
2473 (+64)RatingProvisional
Rating i Provisional Rating, click to know more
May Lunchtime 2021 Division 1(2021-05-31 23:00:00)
Global Rank:   8
Cheated in:   

Ratings System Update

(2021-05-31 23:00:00)
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?
2473 (+40)RatingProvisional
Rating i Provisional Rating, click to know more
May Lunchtime 2021 Division 1(2022-12-20 00:00:00)
Global Rank:   8
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)

None

Contests (33)

December Lunchtime 2017

Days in Month, Strange Function

October Mega Cook-Off 2018 Division 2

Binary Nim 2, Power Tree, Ada and the Staircase, Pumping Water, Ada Bishop

September Challenge 2018 Division 1

Bad Shuffle

December Challenge 2018 Division 1

(Challenge) Delete DAG, Colorblind Feast, Max and Electrical Panel, Directing Edges, Edge Addition, Chef and Interactive XOR

August Lunchtime 2018 Division 2

Chef and Problem Setting, Chef and Eid, Mix Mix Game, X and Two Groups, GukiZ Has More Candies

December Lunchtime 2018 Division 1

Choosing from Buckets, Drawing Lines, Maximize the NOSS, Find Best Path, Age Calculator

February Challenge 2019 Division 1

Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Yet Another Tree Problem, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Maximize the Tax

February Cook-Off 2019 Division 1

Max Range Queries, Chef and Secret Password, Chef and Party

March Challenge 2019 Division 1

Chef and Soccer, Cheating on Queue, Treasure Hunt, Yet Again a Subarray Problem, Matchable Permutations, (Challenge) Interleaving Strings

March Lunchtime 2019 Division 1

Corrupted Seven-Segment Display, Tree Flow, Travelling Saleschef, Partition into Permutations

April Challenge 2019 Division 1

Offer for Chef, Kira Loves Palindromes, Playing with Numbers, Subtree Removal

May Challenge 2019 Division 1

Ada Rooks 2, Where to Build the Roads, Sonya and Gifts, Ada Pawns

June Cook-Off 2019 Division 1

Zawad and Index Sum, Nice Subsets, The Secret Recipe, Ants and Anteaters, Drink Slush

June Lunchtime 2019 Division 1

Fuzzy Conversions, The Grux Permutation , Gii and His Club, Igzi and Burly Array, Ivan Pesic and His World Tour

July Challenge 2019 Division 1

Hit the Coconuts, Guess the Prime!, Codechef War, Circular Merging

July Cook-Off 2019 Division 1

Birthday Gift Again, War in Treeland Again, Minimum and Maximum, Expected Product

July Lunchtime 2019 Division 1 (Unrated)

Delete a Subarray, Professor on a Trip, Two-lane Road

August Challenge 2019 Division 1

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

August Cook-Off 2019 Division 1

Magic Permutations, Warriors, Rich Substrings, Two Circles

September Challenge 2019 Division 1

Biladerim Icin, Fuzzy Linear Combinations, Expected GCD, Doofish Set, Dodgers, Power Sum, Chef Designed a Network, (Challenge) Sebi and CPU Design

October Challenge 2019 Division 1

Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification

October Mega Cook-Off 2019 Division 1

Moonwalk, D-Value, Hidden Sequence, D-Or

November Challenge 2019 Division 1

Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, Single Point of Failure

December Challenge 2019 Division 1

Chefina and Ranges, Binary XOR, Scoring Pairs, Sticky Notes, Addition

January Challenge 2020 Division 1

Chef and Dynamo, Doraemon, Chefina and Prefix Suffix Sums

April Challenge 2020 Division 1

Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise

February Cook-Off 2020 Division 1

Must Be Divisible, Maximum Subsequence Sum, XOR Game, Sweetest Candy , Chef and Pepperoni Pizza Again

March Lunchtime 2020 Division 1 (Unrated)

Maximize LCM, Strip in a Tree!

April Lunchtime 2020 Division 1

Dot Time, Xor Jar Muluk Tar, Triangle Query, Positive Mex

June Challenge 2020 Division 1

The Tom and Jerry Game!, Operations on a Tuple

August Challenge 2020 Division 1

Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements

July Lunchtime 2020 Division 1

Profitable Paths 2, Golomb Sequence, Binary Concatenation

June Cook-Off 2020 Division 1

Per Capita Income, Carry Bed, Checkpoints, Banned Quotient

June Lunchtime 2020 Division 1

Maximum AND, Gold Mining, Square Submatrices

May Lunchtime 2021 Division 1

Tokens On A Tree, Interactive MST, Total Components, K-Subarrays

Total Problems Solved: 147

2473
(Div 1)
★★★★★★
CodeChef Rating (Highest Rating 2599)
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  • Inactive Country Rank

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Contest Contender - Silver Badge

Contest Contender - Silver Badge

Received for participating in 25 Contests

Problem Solver - Bronze Badge

Problem Solver - Bronze Badge

Received for solving 50 Problems

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