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Where can I register for quals?
https://register.oooverflow.io What are the pre-qualifying events?
The winners of the following events will be automatically pre-qualified for DEF CON CTF 2019 Finals:
DEF CON 2018 CTF - 12 August 2018 - prequalified: DEFKOR00T
HITCON CTF 2018 - 21 October 2018 - prequalified: Dragon Sector
RuCTFE 2018 - 10 November 2018 - prequalified: saarsec
C3CTF 2018 - 27 December 2018 - prequalified: mhackeroni
PlaidCTF 2019 - 12 April 2019 - prequalified: HITCON
0CTF 2019 - 08 June 2019