import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * 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;
        InputReader    in                      = new InputReader(inputStream);
        PrintWriter      out                    = new PrintWriter(outputStream);
        Task                 solver               = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
    	public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	}
    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
}
 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.lang.reflect.Array; Array java.lang.reflect import java.util.Arrays; Arrays java.util import java.util.StringTokenizer; StringTokenizer java.util import java.io.IOException; IOException java.io import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.InputStream; InputStream java.io public class Main {
    public static void main(String[] args) {
        InputStream    inputStream    = System.in;
        OutputStream outputStream = System.out;
        InputReader    in                      = new InputReader(inputStream);
        PrintWriter      out                    = new PrintWriter(outputStream);
        Task                 solver               = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
    	public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	}
    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} Main public static void main(String[] args) {
        InputStream    inputStream    = System.in;
        OutputStream outputStream = System.out;
        InputReader    in                      = new InputReader(inputStream);
        PrintWriter      out                    = new PrintWriter(outputStream);
        Task                 solver               = new Task();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream    inputStream    = System.in;
        OutputStream outputStream = System.out;
        InputReader    in                      = new InputReader(inputStream);
        PrintWriter      out                    = new PrintWriter(outputStream);
        Task                 solver               = new Task();
        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 InputReader    in                      = new InputReader(inputStream); in new InputReader(inputStream) PrintWriter      out                    = new PrintWriter(outputStream); out new PrintWriter(outputStream) Task                 solver               = new Task(); solver new Task() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class Task {
    	public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	}
    } Task public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	} solve {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	} 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 int total = Math.abs(A[0] - A[1]); total Math.abs(A[0] - A[1]) Math.abs Math A[0] - A[1] A[0] A 0 A[1] A 1 total += Math.abs(A[1] - A[2]) total Math.abs(A[1] - A[2]) Math.abs Math A[1] - A[2] A[1] A 1 A[2] A 2 out.println(total) out.println out total int testNumber testNumber InputReader in in PrintWriter out out static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    } InputReader public BufferedReader reader; reader public StringTokenizer tokenizer; tokenizer public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } InputReader {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        } reader = new BufferedReader(new InputStreamReader(stream), 32768) reader new BufferedReader(new InputStreamReader(stream), 32768) tokenizer = null tokenizer null InputStream stream stream public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } next {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        } while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } tokenizer == null || !tokenizer.hasMoreTokens() tokenizer == null tokenizer null !tokenizer.hasMoreTokens() tokenizer.hasMoreTokens() tokenizer.hasMoreTokens tokenizer {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            } try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } catch (IOException e) {
                    throw new RuntimeException(e);
                } IOException e {
                    throw new RuntimeException(e);
                } throw new RuntimeException(e); new RuntimeException(e) {
                    tokenizer = new StringTokenizer(reader.readLine());
                } tokenizer = new StringTokenizer(reader.readLine()) tokenizer new StringTokenizer(reader.readLine()) return tokenizer.nextToken(); tokenizer.nextToken() tokenizer.nextToken tokenizer public int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next public class Main {
    public static void main(String[] args) {
        InputStream    inputStream    = System.in;
        OutputStream outputStream = System.out;
        InputReader    in                      = new InputReader(inputStream);
        PrintWriter      out                    = new PrintWriter(outputStream);
        Task                 solver               = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
    	public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	}
    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

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

    static class Task {
    	public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	}
    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;

/**
 * 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;
        InputReader    in                      = new InputReader(inputStream);
        PrintWriter      out                    = new PrintWriter(outputStream);
        Task                 solver               = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
    	public void solve(int testNumber, InputReader in, PrintWriter out) {
    		int[] A = new int[3];
    		A[0] = in.nextInt();
    		A[1] = in.nextInt();
    		A[2] = in.nextInt();
    		Arrays.sort(A);
    		int total = Math.abs(A[0] - A[1]);
    		total += Math.abs(A[1] - A[2]);
    		out.println(total);
    	}
    }

    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;

        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }

        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

    }
}

