The interval between the first draft and the final draft of the national mathematical modeling competition for college students is 14 hours. On the first morning, determine the topic and entry number, and do modeling, programming and network resource retrieval in the afternoon or evening. I started writing my thesis the next day. Submit the first draft of the paper at 20: 00 on the third day and the final draft at 9: 00 on the fourth day. The National Mathematical Modeling Competition for College Students is a mass scientific and technological activity sponsored by China Society of Industrial and Applied Mathematics. It aims to motivate students to learn mathematics, improve their comprehensive ability to use computer technology to build mathematical models and solve practical problems, encourage students to actively participate in extracurricular scientific and technological activities, broaden their knowledge, cultivate innovative spirit and cooperative consciousness, and promote the reform of college mathematics teaching system, teaching content and teaching methods.