试试 The 100 + k Series by Titu Andreescu and others ？另外的见内。

来源: 于 2019-03-30 12:45:22 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

USA(J)MO:

1. Problem Solving Strategies by Engel
2. The 100 + k Series by Titu Andreescu and others
3. Geometry Revisited by Coxeter
4. Participate in WOOT at AOPS
5. USAMO and IMO problems for the last 30 years