Let me introduce myself first, I am not a student, I have already participated in the work. I have been involved with algorithm competitions for about a year and a half. I have been busy with work recently, so I stayed away from algorithm competitions for more than half a year. However, I love algorithm competitions, so I'm back! Looking for the right teammates to join the hashcode contest. If you are interested, please send me a letter on the site and I will tell you my contact information. I usually like to give questions, I am one of the authors of round 732 (div1+div2), and recently, a few friends and I are also preparing another div1+div2, maybe we will meet you in the near future!