Food for Pets

package main

import (
  "fmt"
  "math"
)

func main() {
    var days, dailyDogFood, dailyCatFood, eatenDogsFood, eatenCatsFood int
    fmt.Scanln(&days)

    var availableFood, cookies float64
    fmt.Scanln(&availableFood)

    for i := 1; i <= days; i++ {
        fmt.Scanln(&dailyDogFood)
        fmt.Scanln(&dailyCatFood)

        if i % 3 == 0 {
            cookies += float64(dailyDogFood + dailyCatFood) * 0.1
        }
        eatenDogsFood += dailyDogFood
        eatenCatsFood += dailyCatFood
    }

    totalEatenFood := eatenDogsFood + eatenCatsFood

    fmt.Printf("Total eaten biscuits: %dgr.\n", int(math.Round(cookies)))
    fmt.Printf("%.2f%% of the food has been eaten.\n", float64(totalEatenFood) / float64(availableFood) * 100)
    fmt.Printf("%.2f%% eaten from the dog.\n", float64(eatenDogsFood) / float64(totalEatenFood) * 100)
    fmt.Printf("%.2f%% eaten from the cat.\n", float64(eatenCatsFood) / float64(totalEatenFood) * 100)
}