Today there is a ceremony at school requiring all students to wear school cap. For students who do not bring a hat will be punished and stand in front of the field

You panic because you forgot to bring a hat, find out if there are other students who have two hats, the answer is no. You're frustrated. But suddenly you feel someone put you a hat on from behind you, it's Array, student council president.

"Why are you staring? Hurry to the field, before get punished"