package main

import "fmt"

func main() {
	var N, sum int
	fmt.Scan(&N)
	C := make([]int, N)
	for i := range C {
		fmt.Scan(&C[i])
		sum += C[i]
	}
	ans := 0
	for i := range C {
		if C[i]*10 <= sum {
			ans += 30
		}
	}
	fmt.Println(ans)
}