ltst

• Username: 7★ltst
• Country:  China
• Student/Professional:Student
• Institution:Changjun High School Changshan, 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: 10

Current Ratings Graph Old Ratings Graph

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January Challenge 2021 Division 1(2021-01-11 15:00:00)

Global Rank:   5

Cheated in:   

Ratings System Update

(2021-01-11 15:00:00)

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2660 (+67)RatingProvisional
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January Challenge 2021 Division 1(2022-12-20 00:00:00)

Global Rank:   5

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 (10)

February Challenge 2020 Division 2

Expected Change, Chef and Railway Stations, Long Contest and Cook Off Overlaps, (Challenge) Raisins, Hard Cash, The Theatre Problem, Chef and Gordon Ramsay 2, No Change Required, School of Geometry

March Challenge 2020 Division 1

Chef and DAG, Break, Winning Ways 2, Lasers Everywhere, Inverse of a Function, Lasers Everywhere Alternative, Good Subsequences, Egg-free DAG

April Challenge 2020 Division 1

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

May Challenge 2020 Division 1

Chef and Bitwise Product, Chef and Rainbow Road, Not a Real World Problem, Sorting Vases, Binary Land, Triple Sort, Buying a New String

February Lunchtime 2020 Division 1

Coronavirus, Painter Problem, Swapping to Palindrome, Monsters Battle, Secret Mission

International Coding Marathon (Rated for all)

Is This JEE, Mr Pr in a Dilemma , Conservative Graph, Is This a Long Challenge, Are These Equal, Lavanya Loves DFA, Swap Sort

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

July Challenge 2020 Division 1

Expected Spanning Trees, Expected Repetitions, Weird Product, Doctor Chef, Chef and Dragon Dens, Chefina and Swaps, LCM Constraints, Missing a Point

September Challenge 2020 Division 1

Divide Candies, Ada Matrix, Move the Coins - Creating Tests, Chef and Sums, Rotate the Polyline, Find XOR, Chef and Trump Cards, Move the Coins 2, Chefina and Swap

January Challenge 2021 Division 1

Cool Subsets, Curious Matrix, Chef and Ants, Guess the Tiling, Expected Number of SCCs, Blackjack, Stack-Queue Sort (Challenge), Sequence Creation, Greedy Students, And-Or Game

Total Problems Solved: 97