Atcoder Grand Contest 022 will be held on Saturday (or Sunday depending on your timezone). However, the time of this contest will be three hours later than the usual time for Atcoder contests, i.e. 12am JST instead of 9pm JST. Thus, please check the contest time carefully here.
I (zscoder) am the writer of this contest and this contest counts for GP30 scores.
Duration : 150 minutes (2 hours and 30 minutes, 40 minutes longer than usual)
Scoring Distribution : 300-600-700-1600(1000)-1600-1600
I hope you will enjoy the problems. Although the date of the contest is 1 April 12am JST, it is assured that this contest is not an April Fool joke :)
Let's discuss problems after the contest.