package main

import (
    "fmt"
    "math"
)

func main() {
    var n, sum, ans int
    fmt.Scan(&n)
    c := make([]int, n)

    for i := 0; i < n; i++ {
        var tmp int
        fmt.Scan(&tmp)

        c[i] = tmp
        sum += tmp
    }

    b := int(math.Ceil(float64(sum) / 10.0))

    for i := 0; i < n; i++ {
        if c[i] < b {
            ans += 30
        }
    }

    fmt.Println(ans)
}