import java.util.*; // headers MUST be above the first class

public class Main
{
  public static void main(String[] args)
  {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  }
} import java.util.*; // headers MUST be above the first class util.* java public class Main
{
  public static void main(String[] args)
  {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  }
} Main public static void main(String[] args)
  {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  } main {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int a[] = new int[n]; a new int[n] n int min = sc.nextInt() min sc.nextInt() sc.nextInt sc max = min; max min for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    } int i=1; int i=1; i 1 i<n i n i++ i++ i {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    } {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc if (a[i] < min) min = a[i]; a[i] < min a[i] a i min min = a[i] min a[i] a i if (a[i] > max) max = a[i]; a[i] > max a[i] a i max max = a[i] max a[i] a i System.out.println(max - min) System.out.println System.out System System.out max - min max min String[] args args public class Main
{
  public static void main(String[] args)
  {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  }
} public class Main
{
  public static void main(String[] args)
  {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  }
} Main
import java.util.*; // headers MUST be above the first class

public class Main
{
  public static void main(String[] args)
  {
	Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
	int a[] = new int[n];
	int min = sc.nextInt(), max = min;
    for (int i=1; i<n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) min = a[i];
      if (a[i] > max) max = a[i];
    }
    System.out.println(max - min);
  }
}
