The CS Round 2, also known as the Chinese Programming Contest (CPC), is one of the most prestigious contests for programmers in China. This year's competition was held on June 11-14, and Guoan won the first prize with their impressive score.

In the competition, Guoan used C++ to develop a game called "Dive into the Ocean". The game involves players navigating through various underwater caves and exploring different types of creatures that live in them. The game has been well-received by players and received high scores from both judges and participants.

One of the key features of the game is its use of AI technology, which allows players to interact with the game environment and make decisions based on their actions. This feature has been particularly popular among players who enjoy strategic gameplay.

Another notable aspect of the game is its use of graphics and sound effects, which add to the immersive experience of playing the game. The game also features a multiplayer mode, where players can compete against each other online.

Overall, the game "Dive into the Ocean" is a great example of how C++ can be used to create engaging and interactive games. It showcases the potential of C++ for creating complex and dynamic gaming experiences, and it demonstrates how C++ can be used to tackle difficult programming challenges.