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A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.
最大的荣耀不在于从不跌倒,而在于每次跌倒后都能站起来。
真正改变的唯一方法是改变你的环境。
最深刻的真理往往是我们认为理所当然的那些。
Every man has a right to his opinion, but no man has a right to be wrong in his facts.
I'm not a product of my environment. My environment is a product of me.
Mathematics teaches us to think logically and creatively at the same time.