If it doesn't challenge you, it won't change you.
如果它不挑战你,它就不会改变你。
不要被你不知道或没做的事情定义。
所有人都显得很寂寞,用自己的方式想尽办法排遣寂寞,事实上仍是延续自己的寂寞。
The design of algorithms is both an art and a science.