Sam Lu

Rookie League

• Username: 5★valve_flag_52
• Country:  United States
• Student/Professional:Other
• 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

2048 (+31)RatingProvisional
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Starters 230 (Rated till 5 star)(2026-03-18 22:00:00)

Global Rank:   45

Cheated in:   

Ratings System Update

(2026-03-18 22:00:00)

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NA? (+NA)RatingProvisional
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None(None)

Global Rank:   0

Cheated in:   

Ratings System Update

(None)

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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Learning Paths (0)

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Contests (5)

Starters 176 (Rated)

Friendly Binary Strings, Clothing Store, Run for Fun, Costly Summit, Mex-P Tree (Easy), Same And

Starters 177 (Rated)

Sum By OR, Flip or Reverse, Counting 01 and 10, Ordered Distances, Triangle Checking, 2 Boxes

Starters 179 (Rated)

Lost in the Fest!!, Unlock The Safe, Station Allocation

Starters 181 (Rated)

The Best Matrix, Tree Colouring (Hard), Flip Prefix, Find Outside Array, Tree Colouring (Easy)

Starters 230 (Rated till 5 star)

Prefix Max Counting, Sum of Second Max, A to B (Easy), Sets Diff by K

Total Problems Solved: 24