The Erdős discrepancy problem fascinated me because it was so simple to state yet so deep in its implications.
I believe that happy girls are the prettiest girls.  
"The best ideas come when you're not trying too hard."
让我们感谢那些使我们快乐的人,他们是让我们的灵魂绽放的迷人园丁。
最有效的调试工具仍然是仔细的思考,再加上明智放置的打印语句。