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
 *
 * @author mikit
 */
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);
        BMaximumDifference solver = new BMaximumDifference();
        solver.solve(1, in, out);
        out.close();
    }

    static class BMaximumDifference {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(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);
        BMaximumDifference solver = new BMaximumDifference();
        solver.solve(1, in, out);
        out.close();
    }

    static class BMaximumDifference {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(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);
        BMaximumDifference solver = new BMaximumDifference();
        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);
        BMaximumDifference solver = new BMaximumDifference();
        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) BMaximumDifference solver = new BMaximumDifference(); solver new BMaximumDifference() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class BMaximumDifference {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(max - min);
        }

    } BMaximumDifference public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(max - min);
        } solve {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(max - min);
        } int n = in.nextInt(); n in.nextInt() in.nextInt in int min = Integer.MAX_VALUE min Integer.MAX_VALUE Integer Integer.MAX_VALUE max = 0; max 0 for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            } {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            } int a = in.nextInt(); a in.nextInt() in.nextInt in min = Math.min(min, a) min Math.min(min, a) Math.min Math min a max = Math.max(max, a) max Math.max(max, a) Math.max Math max a out.println(max - min) out.println 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);
        BMaximumDifference solver = new BMaximumDifference();
        solver.solve(1, in, out);
        out.close();
    }

    static class BMaximumDifference {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(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);
        BMaximumDifference solver = new BMaximumDifference();
        solver.solve(1, in, out);
        out.close();
    }

    static class BMaximumDifference {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(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
 *
 * @author mikit
 */
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);
        BMaximumDifference solver = new BMaximumDifference();
        solver.solve(1, in, out);
        out.close();
    }

    static class BMaximumDifference {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int n = in.nextInt();
            int min = Integer.MAX_VALUE, max = 0;
            for (int i = 0; i < n; i++) {
                int a = in.nextInt();
                min = Math.min(min, a);
                max = Math.max(max, a);
            }
            out.println(max - min);
        }

    }
}

