Before the contest started, an experienced audience member rattled off their background knowledge of weightlifting.
"According to the sizes, plates can be divided into three categories: large, medium, and small. Among large ones, red represents 25kg, blue is 20 kg, yellow is 15kg, and green is 10kg; among medium plates, white is 5kg and red is 2.5kg; and among small plates, blue is 2kg, yellow is 1.5kg, green is 1kg, and white is 0.5kg. The minimum weight addition is 1kg, which means putting a small white plate on both sides of the bar. So that’s it." the others all nodded with appreciation, even though nobody had managed to remember all the colors and their respective weights.
"Look! There goes a staff member. He is holding a red plate, how much does that weigh again?"
