Pengwen Zeng

• Username: 4★coderfive
• Country:  China
• Student/Professional:Professional
• Organisation:Unemployed
• 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: 13

Current Ratings Graph Old Ratings Graph

1856 (-48)RatingProvisional
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September Challenge 2016(2016-09-15 15:00:00)

Global Rank:   6020

Cheated in:   

Ratings System Update

(2016-09-15 15:00:00)

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1856 (+236)RatingProvisional
Rating i Provisional Rating, click to know more

September Challenge 2016(2022-12-20 00:00:00)

Global Rank:   6020

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 (13)

June Challenge 2013

Lapindromes

September Challenge 2013

Little Elephant and Exams, Cool Guys, Chef and Integers , Project Spoon, CAO Stage-1, CAO Stage-2

September Challenge 2014

Flooring, Fun with Rotation, Chef and sequence, Chef and Swaps, Chef and Rainbow Array - 2, Sereja and Bubble Sort, Chef and Left-Right

October Challenge 2014

Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus, Chef and Square, Chef and Ground, Sereja and two strings, Remy paints the fence

August Lunchtime 2014

Harrenhal

March Challenge 2015

Chef and Notebooks, Devu and his Class, Sign Wave

January Long Challenge 2016

Sereja and Salesman, Devu and Perfume, Chef and Time Machine, Rupsa and the Game, Chef and Inflation, Churu and Balls

February Challenge 2016

Chef-Detective

March Challenge 2016

Palindromic substrings, maximize the sum, Chef And Special Dishes

June Challenge 2016

Chef And Binary Operation, Devu and an Array, Chef and Coins Game, Chef and Array and K, Chef and Rectangle Array, Chef And The Hiring Event

July Challenge 2016

Andrash and Stipendium, Chef and Segments, Chef and Robots Competition, Chefland and Electricity

August Challenge 2016

Chef and Chocolate, Chef and Round Run

September Challenge 2016

Chef and digits of a number, Faded Palindromes

Total Problems Solved: 65