USAMO 应该更难一点儿吧。当然我这是很久以前的经验

8: Amazing accomplishment; Large boost
IMO Honorable Mention (8.5) 
IMO qualification; 
USAMO qualification; 
AMC 12 Perfect Score; 
USAPhO/USNCO/USABO/USACO National Finalist;
Regeneron ISEF 1st-4th place category; 
Regeneron STS semifinalist; 
Davidson Fellow; 
Presidential Scholar; 
MIT PRIMES; 
MITES
Concord Review Publication; 
FIRST Dean’s List winner; 
top 5 at FIRST World Championships;
Google Code Jam Round 2, 3 Qualifier (Vast majority of Competitors are College students and professionals);
Facebook Hacker Cup Round 2, 3 Qualifier (Vast majority of Competitors are College students and professionals);
International Public Policy Forum Top 32 team; Writing Portfolio Gold Award;
Presidential Scholar of the Arts (~20 per year); 
Scholastic Art;
All National Band or Orchestra performer
Boys Nation Participant; 
SIMR; 
Clark Scholars