import java.util.Scanner;

//public class B_Maximum_Difference {
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
//        int[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        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[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        System.out.println(max - min);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
//        int[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        System.out.println(max - min);
    } main {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
//        int[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        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 min = 0; min 0 int max = 0; max 0 for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        } {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        } int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc if (i == 0) {
                min = max = a;
                continue;
            } i == 0 i 0 {
                min = max = a;
                continue;
            } min = max = a min max = a max a continue; if (a > max) max = a; a > max a max max = a max a if (a < min) min = a; a < min a min min = a min a 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[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        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[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        System.out.println(max - min);
    }
} Main
import java.util.Scanner;

//public class B_Maximum_Difference {
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();
//        int[] num = new int[N];
        int min = 0;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int a = sc.nextInt();
            if (i == 0) {
                min = max = a;
                continue;
            }
            if (a > max) max = a;
            if (a < min) min = a;
        }
        System.out.println(max - min);
    }
}

