Credit System

package main

import "fmt"

func main() {
    var n, number int
    fmt.Scanln(&n)

    totalGrades := 0.0
    totalCredits := 0.0

    for i := 0; i < n; i++ {
        fmt.Scanln(&number)

        grade := number % 10
        credit := number / 10

        totalGrades += float64(grade)

        if grade == 3 {
            totalCredits += float64(credit) * 0.50
        } else if grade == 4 {
            totalCredits += float64(credit) * 0.70
        } else if grade == 5 {
            totalCredits += float64(credit) * 0.85
        } else if grade == 6 {
            totalCredits += float64(credit)
        }
    }

    fmt.Printf("%.2f\n%.2f\n", totalCredits, totalGrades / float64(n))
}