import java.util.Scanner;
class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        if(n<0){
            System.out.pritln("Invalid input");
            return;
        }
        int[] arr=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        int max=0;
        int min=arr[0];
        for(int i=0;i<n;i++){
            if(arr[i]<min){
                min=arr[i];
            }
            int profit=arr[i]-min;
            if(profit>max){
                max=profit;
            }
        }
        System.out.println(max);
        double per=(double)max*100/arr[0];
        System.out.printf("%.02f",per);
    }
}