Disclaimer: I'm a curious student from National Taiwan University.

Reference: https://algorithmics.comp.nus.edu.sg/

According to the first section, 3body2 (sidhant, btzy, bayweiheng) will go to ICPC World Finals 2019.

However, according to the published rule in ICPC Selection Contest For Regionals 2018 section, Send Bobs to Alice (goodthingstaketime_._, MofK, Tran Tan Phat) should go instead.

Anyone know the story?

Details

According to the blog of C. J. Hwang., NUS have 3 qualified teams: Send Bobs to Alice, 3body2, and Pandamiao. The NUS rule said the team with lowest score wins, where score is (NUS rank of Singapore Preliminary-1)*1.1 + (NUS rank of Jakarta/Nakhon Pathom/Yangon-1)*2 + (NUS rank of Singapore-1)*2.9. Here are the scoreboards:

• Singapore preliminary: https://asiasg18-prelim.kattis.com/standings
• Jakarta: https://competition.binus.ac.id/contest/public/
• Nakhon Pathom: https://www.ict.mahidol.ac.th/acmicpc/2018/FinalScore2018/2018%20ICPC%20Asia%20Nakhon%20Pathom%20Regional%20Contest.html
• Yangon: http://www.ucsy.edu.mm/ucsy/pages/sb-aryangon2018.html
• Singapore: https://asiasg18.kattis.com/standings

The NUS ranks:

• Send Bobs to Alice: 2nd in Singapore preliminary, 2nd in Nakhon Pathom, 1st in Singapore
• 3body2: 4th in Singapore preliminary, 1st in Yangon, 2nd in Singapore
• Pandamiao: 3rd in Singapore preliminary, 1st in Nakhon Pathom, 5th in Singapore

Accordingly, the scores are:

• Send Bobs to Alice: (2-1)*1.1 + (2-1) * 2 + (1-1) * 2.9 = 3.1
• 3body2: (4-1)*1.1 + (1-1) * 2 + (2-1) * 2.9 = 6.2
• Pandamiao: (3-1)*1.1 + (1-1) * 2 + (5-1) * 2.9 = 13.8

Therefore, Send Bobs to Alice has the lowest score and should go to World Finals.