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

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author hakamada
 */
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);
        AtCoder103_1 solver = new AtCoder103_1();
        solver.solve(1, in, out);
        out.close();
    }

    static class AtCoder103_1 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        }

    }
}
 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.Arrays; Arrays java.util 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);
        AtCoder103_1 solver = new AtCoder103_1();
        solver.solve(1, in, out);
        out.close();
    }

    static class AtCoder103_1 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        }

    }
} 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);
        AtCoder103_1 solver = new AtCoder103_1();
        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);
        AtCoder103_1 solver = new AtCoder103_1();
        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) AtCoder103_1 solver = new AtCoder103_1(); solver new AtCoder103_1() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class AtCoder103_1 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        }

    } AtCoder103_1 public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        } solve {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        } int[] inp = new int[3]; inp new int[3] 3 inp[0] = in.nextInt() inp[0] inp 0 in.nextInt() in.nextInt in inp[1] = in.nextInt() inp[1] inp 1 in.nextInt() in.nextInt in inp[2] = in.nextInt() inp[2] inp 2 in.nextInt() in.nextInt in int total[] = {0, 0, 0, 9999}; total {0, 0, 0, 9999} 0 0 0 9999 total[0] = Math.abs(inp[0] - inp[1]) total[0] total 0 Math.abs(inp[0] - inp[1]) Math.abs Math inp[0] - inp[1] inp[0] inp 0 inp[1] inp 1 total[0] += Math.abs(inp[1] - inp[2]) total[0] total 0 Math.abs(inp[1] - inp[2]) Math.abs Math inp[1] - inp[2] inp[1] inp 1 inp[2] inp 2 total[1] = Math.abs(inp[0] - inp[2]) total[1] total 1 Math.abs(inp[0] - inp[2]) Math.abs Math inp[0] - inp[2] inp[0] inp 0 inp[2] inp 2 total[1] += Math.abs(inp[0] - inp[1]) total[1] total 1 Math.abs(inp[0] - inp[1]) Math.abs Math inp[0] - inp[1] inp[0] inp 0 inp[1] inp 1 total[2] = Math.abs(inp[1] - inp[2]) total[2] total 2 Math.abs(inp[1] - inp[2]) Math.abs Math inp[1] - inp[2] inp[1] inp 1 inp[2] inp 2 total[2] += Math.abs(inp[0] - inp[1]) total[2] total 2 Math.abs(inp[0] - inp[1]) Math.abs Math inp[0] - inp[1] inp[0] inp 0 inp[1] inp 1 total[3] = Math.abs(inp[1] - inp[2]) total[3] total 3 Math.abs(inp[1] - inp[2]) Math.abs Math inp[1] - inp[2] inp[1] inp 1 inp[2] inp 2 total[3] += Math.abs(inp[0] - inp[2]) total[3] total 3 Math.abs(inp[0] - inp[2]) Math.abs Math inp[0] - inp[2] inp[0] inp 0 inp[2] inp 2 Arrays.sort(total) Arrays.sort Arrays total out.println(total[0]) out.println out total[0] total 0 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);
        AtCoder103_1 solver = new AtCoder103_1();
        solver.solve(1, in, out);
        out.close();
    }

    static class AtCoder103_1 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        }

    }
} 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);
        AtCoder103_1 solver = new AtCoder103_1();
        solver.solve(1, in, out);
        out.close();
    }

    static class AtCoder103_1 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        }

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

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author hakamada
 */
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);
        AtCoder103_1 solver = new AtCoder103_1();
        solver.solve(1, in, out);
        out.close();
    }

    static class AtCoder103_1 {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] inp = new int[3];

            inp[0] = in.nextInt();
            inp[1] = in.nextInt();
            inp[2] = in.nextInt();

            int total[] = {0, 0, 0, 9999};

            total[0] = Math.abs(inp[0] - inp[1]);
            total[0] += Math.abs(inp[1] - inp[2]);

            total[1] = Math.abs(inp[0] - inp[2]);
            total[1] += Math.abs(inp[0] - inp[1]);

            total[2] = Math.abs(inp[1] - inp[2]);
            total[2] += Math.abs(inp[0] - inp[1]);

            total[3] = Math.abs(inp[1] - inp[2]);
            total[3] += Math.abs(inp[0] - inp[2]);

        /*
        total[2] = Math.abs(inp[1] - inp[2]);
        total[2] += Math.abs(inp[3] - inp[2]);
        */

            Arrays.sort(total);
            out.println(total[0]);
        }

    }
}

