The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
Writing is a way of life, a way of being in the world.
我不想永远活着，但我确实想在我活着的时候好好生活。
In a world filled with hate, we must still dare to hope. In a world filled with anger, we must still dare to comfort. In a world filled with despair, we must still dare to dream. And in a world filled with distrust, we must still dare to believe.