下面是另一个来源，没有提到家人没能参加。需要弄清是哪看到的，查了一下竟然没有google 本身网站的排在搜索前面
https://www.geeksforgeeks.org/competitive-programming/google-code-jam/
Eligibility:
- Contestant must be at least sixteen (16) years of age at the time of registration for a Contest however, to participate in a final round of Code Jam the contestant must be at least eighteen (18) years old or the age of majority in their country of residence.
- Contestants must have a valid Google account to enter the contest.
- Contestants who are residents of Crimea, North Korea, Quebec, the so-called Donetsk People's Republic, and Luhansk People's Republic, and where prohibited by law are not eligible.
- Contestant is not eligible if he/she is a current employee, intern, contractor, officer, or director of Google or Alphabet or their affiliates.
Rounds: Code jam consists of a few rounds followed by the world finals. One must
