tungwaiyip.info

home

about me

links

Blog

< February 2010 >
SuMoTuWeThFrSa
  1 2 3 4 5 6
7 8 910111213
14151617181920
21222324252627
28      

past articles »

Click for San Francisco, California Forecast

San Francisco, USA

 

Refrigerator Madness solution (Facebook programming puzzle)

Refrigerator Madness is the second Facebook programming puzzle I have tried. The problem description is complicated. I won't try to repeat it here but to suggest you to refer to the original facebook page.

To solve this problem it is necessary to see through the smokescreen. Instead of thinking how much Red Bull a Facebook engineer likes to drink, it is easier to map it to a problem known as Two-Sided Matching. A model with intuitive meaning is a marriage matchup between a group of man and woman. Each man has his list of preferred woman and each woman has her list of preferred man. The marriage is considered stable if there are no two people of opposite sex who were not married to each other but would both prefer to be.

For the Refrigerator Madness problem just map the engineer from the upper 50th percentile to "man" and lower 50th percentile to "woman" (or vice versa). The matching condition is equivalent to the stable marriage criteria.

At this point the problem can be solved by applying the Gale-Shapley algorithm. Write the code and it's done!

2010.02.22 [] - comments

 

 

blog comments powered by Disqus

past articles »

 

BBC News

 

Manchester attack: Trump condemns media leaks (25 May 2017)

 

Donald Trump tells Nato allies to pay up at Brussels talks (25 May 2017)

 

Trump pushes past Montenegro’s PM (25 May 2017)

 

Greek ex-PM Lucas Papademos injured in Athens car blast (25 May 2017)

 

US air strike on IS killed 105 civilians in Iraq's Mosul (25 May 2017)

 

Indian acid-attack bride finds love from a wrong number (25 May 2017)

 

Fitness trackers 'poor at measuring calories burned' (25 May 2017)

 

Fox's Sean Hannity loses advertisers after conspiracy theory (25 May 2017)

 

Pregnant teenager banned from graduation ceremony (25 May 2017)

 

Americans should learn Russian to influence Trump, Kerry says (25 May 2017)

more »

 

SF Gate

 

Bay Area News (7 Jan 2012)

 

City Insider (11 Feb 2012)

 

Crime Scene (13 Feb 2012)

 

C.W Newius Column (10 Jan 2012)

 

C.W. Nevius Blog (11 Feb 2012)

 

Education News (10 Jan 2012)

 

KALW (11 Feb 2012)

 

Matier and Ross Blog (11 Feb 2012)

 

How to get a job at the Bay Area's best companies to work for (25 May 2017)

 

Bay Area home prices hit record as sales drop (25 May 2017)

 

Business News Roundup, May 25 (24 May 2017)

 

Unity, software maker behind ‘Pokémon Go,’ agrees to funding (24 May 2017)

 

Report: Tesla factory suffered higher injury rate than average (24 May 2017)

 

Serena Williams accepts a new challenge, in Silicon Valley (24 May 2017)

more »

 


Site feed Updated: 2017-May-25 12:00