import java.util.Scanner;

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 max = 0;
        int min = 999999999;

        for (int i = 0; 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.Scanner; Scanner java.util 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 max = 0;
        int min = 999999999;

        for (int i = 0; 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 max = 0;
        int min = 999999999;

        for (int i = 0; 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 max = 0;
        int min = 999999999;

        for (int i = 0; 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 max = 0; max 0 int min = 999999999; min 999999999 for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            if (a[i] < min) {
                min = a[i];
            }
            if (a[i] > max) {
                max = a[i];
            }
        } int i = 0; int i = 0; i 0 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] 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] 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 max = 0;
        int min = 999999999;

        for (int i = 0; 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 max = 0;
        int min = 999999999;

        for (int i = 0; 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.Scanner;

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 max = 0;
        int min = 999999999;

        for (int i = 0; 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);
    }

}