Safari

package main

import "fmt"

func main() {
    var budget, fuel float64
    fmt.Scanln(&budget)
    fmt.Scanln(&fuel)

    sum := 2.10 * fuel + 100

    var day string
    fmt.Scanln(&day)

    if day == "Saturday" {
        sum *= 0.90
    } else {
        sum *= 0.80
    }

    if budget >= sum {
        fmt.Printf("Safari time! Money left: %.2f lv.\n", budget - sum)
    } else {
        fmt.Printf("Not enough money! Money needed: %.2f lv.\n", sum - budget)
    }
}