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];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = 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];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = 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];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = a[i];
            }
        }

        System.out.println(max - min);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] a = new int[n];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = 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 for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
        } {
            a[i] = sc.nextInt();
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int max = 1; max 1 int min = 1000000000; min 1000000000 for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = a[i];
            }
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = a[i];
            }
        } {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = a[i];
            }
        } if (max < a[i]) {
                max = a[i];
            } max < a[i] max a[i] a i {
                max = a[i];
            } max = a[i] max a[i] a i if (min > a[i]) {
                min = a[i];
            } min > a[i] min a[i] a i {
                min = a[i];
            } min = a[i] min 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];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = 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];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = 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];

        for (int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
        }

        int max = 1;
        int min = 1000000000;
        for (int i = 0; i < n; i++) {
            if (max < a[i]) {
                max = a[i];
            }

            if (min > a[i]) {
                min = a[i];
            }
        }

        System.out.println(max - min);
    }
}