C89 Training

As I ran, I gradually felt a little tired, but it was just a little bit of tiredness, and I didn't know how long I had to run before I felt tired.

Walking past the night when I was sitting on a chair by the roadside, I asked him, "How long have I been running? Did you count how many laps I ran?"

Night looked at me and said, "You've only run 54 laps. It's only 30 minutes