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
 */
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);
        ABC103_A solver = new ABC103_A();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC103_A {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[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);
        ABC103_A solver = new ABC103_A();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC103_A {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[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);
        ABC103_A solver = new ABC103_A();
        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);
        ABC103_A solver = new ABC103_A();
        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) ABC103_A solver = new ABC103_A(); solver new ABC103_A() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class ABC103_A {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[0]);

        }

    } ABC103_A public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[0]);

        } solve {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[0]);

        } int[] a = new int[3]; a new int[3] 3 a[0] = in.nextInt() a[0] a 0 in.nextInt() in.nextInt in a[1] = in.nextInt() a[1] a 1 in.nextInt() in.nextInt in a[2] = in.nextInt() a[2] a 2 in.nextInt() in.nextInt in Arrays.sort(a) Arrays.sort Arrays a out.print(a[2] - a[0]) out.print out a[2] - a[0] a[2] a 2 a[0] a 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);
        ABC103_A solver = new ABC103_A();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC103_A {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[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);
        ABC103_A solver = new ABC103_A();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC103_A {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[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
 */
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);
        ABC103_A solver = new ABC103_A();
        solver.solve(1, in, out);
        out.close();
    }

    static class ABC103_A {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int[] a = new int[3];
            a[0] = in.nextInt();
            a[1] = in.nextInt();
            a[2] = in.nextInt();

            Arrays.sort(a);

            out.print(a[2] - a[0]);

        }

    }
}

