1) Sparky_Master_WCH1226 (6 grade, 6 attempts left), IOI 2021 unofficial absolute winner
2) Sparky_WCH_Master1226 (12 grade, 0 attempts left)
3) petrwuyihong (12 grade, 0 attempts left)
4) Lotus (3 grade, 9 attempts left)
Good luck them!!! They are really best!