02. Bike Race

package main
import "fmt"

func main() {
    var juniorCount, seniorCount int
    fmt.Scanln(&juniorCount)
    fmt.Scanln(&seniorCount)

    var trace string
    fmt.Scanln(&trace)

    var juniorPrice = 0.0
    var seniorPrice = 0.0

    switch (trace) {
        case "trail":
            juniorPrice = 5.50
            seniorPrice = 7.00
        case "cross-country":
            juniorPrice = 8.00
            seniorPrice = 9.50
        case "downhill":
            juniorPrice = 12.25
            seniorPrice = 13.75
        case "road":
            juniorPrice = 20.00
            seniorPrice = 21.50
    }

    var sum = juniorPrice * float64(juniorCount) + seniorPrice * float64(seniorCount)

    if (trace == "cross-country" && juniorCount + seniorCount >= 50) {
            sum *= 0.75
    }

    fmt.Printf("%.2f\n", sum * 0.95)
}