Lao.K

• Username: 7★lk_zeromaker
• Country:  China
• Student/Professional:Student
• Institution:Yali Middle School, China
• 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: 7

Current Ratings Graph Old Ratings Graph

2501 (+80)RatingProvisional
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June Challenge 2020 Division 1(2020-06-15 15:00:00)

Global Rank:   18

Cheated in:   

Ratings System Update

(2020-06-15 15:00:00)

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2501 (+196)RatingProvisional
Rating i Provisional Rating, click to know more

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

Global Rank:   18

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 (7)

January Challenge 2019 Division 2

Different Neighbours, Yet Another Problem About Sequences, A Pizza Slice, (Challenge) Chef and Matching Game, Fancy Quotes, Distinct Pairs, Lucky Number Game, Chef and Modulo Game

December Challenge 2019 Division 2

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

January Challenge 2020 Division 1

Chef and Dynamo, (Challenge) Building Anthills, Chefland Army, Army of Me, English, Chefina and Prefix Suffix Sums, Doofish Matrix, Doraemon

February Challenge 2020 Division 1

Long Contest and Cook Off Overlaps, (Challenge) Raisins, Chef and Gordon Ramsay 2, No Change Required, Expected Change, Chef and Railway Stations, Balancing Network Revisited

March Challenge 2020 Division 1

Inverse of a Function, Egg-free DAG, Good Subsequences, (Challenge) 300 IQ Ants, Lasers Everywhere Alternative, Lasers Everywhere, Winning Ways 2, Break, Chef and DAG

April Challenge 2020 Division 1

Squared Subsequences, Leaked Answers (Challenge), Line Line Line Graph, A Leisurely Journey, Factor Tree, Ready Bitwise, Perfect Power Divisors, Strange Number

June Challenge 2020 Division 1

The Tom and Jerry Game!, Operations on a Tuple, The Delicious Cake, Convenient Airports, Guessing Game, Perfect Partitions, Covid Sampling (Challenge), Danya and Different Values

Total Problems Solved: 55