Three brothers

package main

import (
  "fmt"
  "math"
)

func main() {
    var firstTime, secondTime, thirdTime, fatherTime float64
    fmt.Scanln(&firstTime)
    fmt.Scanln(&secondTime)
    fmt.Scanln(&thirdTime)
    fmt.Scanln(&fatherTime)

    cleaningTime := 1 / (1 / firstTime + 1 / secondTime + 1 / thirdTime) * 1.15

    fmt.Printf("Cleaning time: %.2f\n", cleaningTime)
    if fatherTime > cleaningTime {
        fmt.Printf("Yes, there is a surprise - time left -> %d hours.\n", int(fatherTime - cleaningTime))
    } else {
        fmt.Printf("No, there isn't a surprise - shortage of time -> %d hours.\n", int(math.Ceil(cleaningTime - fatherTime)))
    }
}