sojisan

• Username: 4★sojisan
• Country:  Japan
• Student/Professional:Student
• Institution:Tohoku University, Japan
• 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: 5

Current Ratings Graph Old Ratings Graph

1982 (+67)RatingProvisional
Rating i Provisional Rating, click to know more

January Cook-Off 2021 Division 1 (2021-01-25 00:30:00)

Global Rank:   70

Cheated in:   

Ratings System Update

(2021-01-25 00:30:00)

This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more

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1982 (-150)RatingProvisional
Rating i Provisional Rating, click to know more

January Cook-Off 2021 Division 1 (2022-12-20 00:00:00)

Global Rank:   70

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 (5)

November Challenge 2020 Division 2

Restore Sequence, Ada and Dishes, Iron, Magnet and Wall

December Cook-Off 2020 Division 1

Self-Destructing Strings, Sed Passwords, Circle of Chaos

January Cook-Off 2021 Division 1

Mex Subsequence, Not Too Colourful

October Lunchtime 2020 Division 2

AND Plus OR, Chef and Subtree MEXs, Chef Is Just Throwing Random Words

UWCOI 2021 (Rated for all)

Array Swaps, Hidden Numbers

June Lunchtime 2021 Division 1

False Number, HTML Tags, Richie Rich

Total Problems Solved: 24