import java.util.Scanner; import java.util.Arrays; public class Main { public static void main(String args[]) { Scanner sc = new Scanner(System.in); int N = sc.nextInt(); int K = sc.nextInt(); int[] num = new int[N]; for(int i = 0; i < N; i++) num[i] = sc.nextInt(); Arrays.sort(num); System.out.println(num[N] - num[0]); } }