Broaden your horizons and meet awesome people. At that time, I saw all kinds of Daniel through ACM ICPC, and then I was brought into the temple of Topcoder by these experts, and I had the opportunity to practice in google beijing. At that time, I discovered that the outside world was wonderful, and the gap between myself and the masters was so huge. Later, even in CMU and icpc, I was not afraid of any computer courses in it. Finally, in the company, I found countless idols and national team writers sitting next to me, working with me like a dream (such as, Fu, Li Rui, Wei, Mao Ziqing, etc. ). Without icpc, I don't think I could have experienced so many subsequent events. I admit that it changed my life, and I am especially grateful for it. So if the subject is confused about the contest, I will send a sentence: keep walking, don't settle down. In addition, we may not be able to participate in acm-icpc for life, but we can be friends with the comrades inside for life. This will be a great wealth in one's life.