Problems from The 2019 ICPC Vietnam National Contest

Languages
A New Adventure0.00532125517314%6.3Harden
Breaking Cake0.03110867314221%5.7Harden
Checking Break0.0680091818921%6.2Harden
Dropping Ball0.0016423519326%4.2Mediumen
Easy Probability0.001557546509%8.9Harden
Final Exam1.12982976727%9.2Harden
Gathering in Yorknew0.01574158532020%5.9Harden
Hunter x Communication0.231992812733%7.9Harden
IMO Harder Problem0.01661045149%6.3Harden
Just Enough Bridges0.0523523657521%8.0Harden
Kingdom of Ants0.25148242510324%6.5Harden
Learning to code0.00899621406%8.3Harden