David Wang

• Username: 3★hacker007
• Student/Professional:Professional
• Organisation:For A Startup
• CodeChef Pro Plan: No Active Plan. View Details

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Last 6 Months 2025 (Jul-Dec)2025 (Jan-Jun)2024 (Jul-Dec)2024 (Jan-Jun)

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No. of Contests Participated: 48

Current Ratings Graph Old Ratings Graph

1787 (-12)RatingProvisional
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December Challenge 2013(2013-12-16 15:00:00)

Global Rank:   1512

Cheated in:   

Ratings System Update

(2013-12-16 15:00:00)

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1787 (+144)RatingProvisional
Rating i Provisional Rating, click to know more

December Challenge 2013(2022-12-20 00:00:00)

Global Rank:   1512

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 (48)

The January 2011 Cook-Off

Holes in the text

February Cook - Off Challenge

Three Way Communications

April Cook-Off Challenge

Internet Media Types, A Prime Conjecture

June Cook-off

Correctness of Knight Move

July Cook-off 2011

Garden Squares

August Cook-off 2011

Open the Dragon Scroll

October Cook-off

Chef Travel Routes

November Cook-Off

Subanagrams

December Cook-Off

Ciel and A-B Problem

January Cook-Off

Collision in Space

February 2012 Challenge

Lucky Long, Count of Maximum

February 2012 Cook-off

Daily Train

March 2012 Challenge

Free Shuttle Service, Home Delivery, Spoon in Matrix

March Cook-Off 2012

Ciel Numbers I, Ciel Numbers II

April Challenge 2012

Double Strings, Fit to Play

April Cook-Off 2012

Top Batsmen

May Challenge 2012

Jewels and Stones, Lucky lucky number

May Cook-Off 2012

Little Elephant and Balance, Little Elephant and Strings

June Challenge 2012

Little Elephant and Candies, Arranging Cup-cakes

June Cook-Off 2012

Connecting Soldiers, Closing the Tweets

July Challenge 2012

The Gray-Similar Code, Gift Rift

August Challenge 2012

Little Elephant and Bombs, Delivery Boy

July Cook-Off 2012

Ciel and Receipt, Ciel and Map, Ciel and Tomya

August Cook-Off 2012

Code Crazy Minions

September Challenge 2012

Kisses & Hugs, Racing Horses

October Challenge 2012

Fierce Battles

October Cook-Off 2012

Buying Sweets

November Challenge 2012

Coin Flip, Sridhar Likes Travelling

November Cook-Off 2012

Little Elephant and Permutations, Little Elephant and Divisors

December Challenge 2012

Granama Recipes, Magic Rankings

December Cook-Off 2012

Packaging Cupcakes, Reversing directions

January Challenge 2013

The Minimum Number Of Moves, Three Different Numbers, Chef of the Year

January Cook-Off 2013

Minimum Distance

February 2013 Challenge

Little Elephant and Cards, Buy1-Get1, Climbing Stairs

March Challenge 2013

Fire Escape Routes, Approximately, Tourist Translations

March Cook-off 2013

The Ball And Cups

April Challenge 2013

Maximum Weight Difference, Levy Conjecture

April Cook-Off 2013

Andrew and the Meatballs, Andrew and the Meatballs again

May Cook-off 2013

Subtraction Game 1

June Cook-Off 2013

Attic Crossing, Lyra and the Alethiometer

August Challenge 2013

Little Elephant and Lemonade, Splitting Candies, Hello Hello

September Challenge 2013

Chef and Integers , Project Spoon, CAO Stage-1

September Cook-Off 2013

Code

December Challenge 2013

Chef and Codes, Magic Pairs

Total Problems Solved: 102