import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class No191{
	public static void main(String[] args) {
		try{
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			int N = Integer.parseInt(br.readLine());
			String[] temp = br.readLine().split(" ");
			int[] vote = new int[N];
			for(int i=0; i < N; i++)
				vote[i] = Integer.parseInt(temp[i]);
			System.out.println(notReturnDeposit(N,vote));
		}
		catch(IOException e){
			e.getStackTrace();
		}
		catch(NumberFormatException e){
			e.getStackTrace();
		}
	}
	
	public static int notReturnDeposit(int n, int[] a){
		int voteTotal = 0;
		int notReturnMoney = 0;
		for(int i=0; i < n; i++)
			voteTotal += a[i];
		for(int i=0; i < n; i++){
			if(a[i] <= (voteTotal/10))
				notReturnMoney += 30;
		}
		return notReturnMoney;
	}
	
}