import java.util.Scanner;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        double n = scan.nextInt();
        
        ArrayList<Integer> arr = new ArrayList<>();
        for (int i = 0; i < n; i++) {
            arr.add(scan.nextInt());
        }
        
        Collections.sort(arr);
        int last = arr.get(arr.size() - 1); //实际长度比索引大于1，所以减一
        int first = arr.get(0);
        double sum = 0;
        for (int i = 0; i < arr.size(); i++) {
            sum += arr.get(i);
        }
        
        double mean = sum / n * 1.00;
        
        // String strLAS = String.format("%1f",last);
        // String strFIR = String.format("%1f",first); / 转为字符串，用printf输出
        // String strMEA = String.format("%.2f",mean);
        
        System.out.println(last);
        System.out.println(first);
        System.out.printf("%.2f", mean); //prinf支持.2输出，println需先转String类
        
        scan.close();
    }
}

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