1, Nine Chapters Arithmetic Competition is a competition sponsored by Nine Chapters Arithmetic. As an organization focusing on the training of algorithms and data structures, the topic design and difficulty of special competitions are very high, which can examine the participants' deep understanding and application ability in algorithms and data structures.

2. Participating in the Nine-Chapter Arithmetic Competition can improve the contestants' ability in algorithm and data structure, which is of great help to improve their personal programming level and ability to solve practical problems. At the same time, the Nine-Chapter Arithmetic Competition also provides rich prizes and honors, which is a very valuable competition for those who are ambitious in the field of algorithms.