C1694 Cat Restriction

"We did a good job. I just came here for a walk." After saying that, Qin Guan walked into the research and development department.

In the modern office, everyone had a computer in front of them. They could hear the sound of keyboard tapping, but there were more. They were all deep in thought in front of the computer, so it was easy to type the code... But, modifying the code... Looking for a bug