import java.util.Scanner;

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

        int min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = 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 min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        }
        System.out.println(max - min);

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        }
        System.out.println(max - min);

    } main {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();

        int min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = 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 = 1000000000; min 1000000000 int max = 0; max 0 for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        } {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        } int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc if (A < min) {
                min = A;
            } A < min A min {
                min = A;
            } min = A min A if(A > max) {
                max = A;
            } A > max A max {
                max = A;
            } max = A max 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 min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = 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 min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        }
        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 min = 1000000000;
        int max = 0;
        for (int i = 0; i < N; i++) {
            int A = sc.nextInt();
            if (A < min) {
                min = A;
            }
            if(A > max) {
                max = A;
            }
        }
        System.out.println(max - min);

    }
}
