Series

package main

import (
    "bufio"
    "fmt"
    "os"
    "math"
    "strconv"
)

func main() {
    scanner := bufio.NewScanner(os.Stdin)
    scanner.Scan()
    budget,_ := strconv.ParseFloat(scanner.Text(), 64)

    scanner.Scan()
    volume,_ := strconv.Atoi(scanner.Text())

    var name string
    var price float64

    for i := 0; i < volume; i++ {
        scanner.Scan()
        name = scanner.Text()

        scanner.Scan()
        price,_ = strconv.ParseFloat(scanner.Text(), 64)

        switch name {
        case "Thrones":
            price *= 0.5
        case "Lucifer":
            price *= 0.6
        case "Protector":
            price *= 0.7
        case "TotalDrama":
            price *= 0.8
        case "Area":
            price *= 0.9
        }

        budget -= price
    }

    if budget >= 0 {
        fmt.Printf("You bought all the series and left with %.2f lv.\n", budget)
    } else {
        fmt.Printf("You need %.2f lv. more to buy the series!\n", math.Abs(budget))
    }
}