12th Challenge 24

• tasks
• results

Solutions and editorials

• A. Alarm system
• D. Drums
• IJ. Air hockey

Write-ups by others

Finals:

• http://www.catalysts.cc/wissenswertes/catalysts-beim-finale-der-challenge24/ (German, coreCoder team)
• http://codeforces.ru/blog/entry/4459 (Russian and English, Progopedia team)

EC:

• http://icarusdes.com/2012/02/26/challenge-24-ec-tapasztalatok/ (Hungarian)
• http://xcafebabe.blogspot.com/2012/02/challenge24-2012.html (English)
• http://codeforces.com/blog/entry/3973 (English)