Unsong Choe

• Username: 7★rns_cus
• Country:  North Korea
• Student/Professional:Student
• Institution:Kim II-sung University
• 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: 6

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2845 (+96)RatingProvisional
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March Challenge 2021 Division 1(2021-03-15 15:00:00)

Global Rank:   1

Cheated in:   

Ratings System Update

(2021-03-15 15:00:00)

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2845 (+251)RatingProvisional
Rating i Provisional Rating, click to know more

March Challenge 2021 Division 1(2022-12-20 00:00:00)

Global Rank:   1

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 (6)

December Cook-Off 2020 Division 2

Self-Destructing Strings, Sed Passwords, Catch the Thief, Circle of Chaos, Carry All Fruits, Minimum Attendance Requirement, Mysterious Sequence

January Cook-Off 2021 Division 2

Mex Subsequence, Not Too Colourful, Prime Tuples, Maximise Islands, Prefix And, Equal Gifts

December Lunchtime 2020 Division 1 (Unrated)

K-Tuple Tree, One Zero Swaps, Three Letters, Even Sequence

November Lunchtime 2020 Division 2

Gasoline Introduction, Xor Compare, Gasoline, Rook Path, Fractions

February Challenge 2021 Division 1

Team Name, Cell Shell, Bash Matrix, Cut the Cake (Challenge), Dream and the Multiverse, Multiple Games, Prime Game, Another Tree with Number Theory, XOR Sums

February Lunchtime 2021 Division 1

Average Sorting, Sed Max, Chef and Reordering, Independent Set

March Challenge 2021 Division 1

Clique Boolean Expression, Maximum Topological Sort, Random Walk Queries, Locked Safe, Wireless Electricity (Challenge), Space Arrays, Substring Probability, Paparazzi Gennady, Consecutive Adding, Dense Graph

Total Problems Solved: 61