import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC102_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC102_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) ABC102_B solver = new ABC102_B(); solver new ABC102_B() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class ABC102_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        }

    } ABC102_B public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        } solve {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        } int n = in.nextInt(); n in.nextInt() in.nextInt in long max = Long.MIN_VALUE; max Long.MIN_VALUE Long Long.MIN_VALUE long min = Long.MAX_VALUE; min Long.MAX_VALUE Long Long.MAX_VALUE for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            } {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            } long tmp = in.nextLong(); tmp in.nextLong() in.nextLong in max = Math.max(max, tmp) max Math.max(max, tmp) Math.max Math max tmp min = Math.min(min, tmp) min Math.min(min, tmp) Math.min Math min tmp out.print(max - min) out.print out max - min max min int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC102_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC102_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ABC102_B solver = new ABC102_B();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC102_B {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            long max = Long.MIN_VALUE;
            long min = Long.MAX_VALUE;

            for (int i = 0; i < n; i++) {
                long tmp = in.nextLong();

                max = Math.max(max, tmp);
                min = Math.min(min, tmp);
            }

            out.print(max - min);
        }

    }
}

