import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	} main {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	} Scanner sc1 = new Scanner(System.in); sc1 new Scanner(System.in) int a = sc1.nextInt(); a sc1.nextInt() sc1.nextInt sc1 int b = sc1.nextInt(); b sc1.nextInt() sc1.nextInt sc1 int c = sc1.nextInt(); c sc1.nextInt() sc1.nextInt sc1 int temp = 0; temp 0 int ans = 0; ans 0 ans += Math.abs(b-a) ans Math.abs(b-a) Math.abs Math b-a b a ans += Math.abs(c-b) ans Math.abs(c-b) Math.abs Math c-b c b temp += Math.abs(c-a) temp Math.abs(c-a) Math.abs Math c-a c a temp += Math.abs(b-c) temp Math.abs(b-c) Math.abs Math b-c b c if (ans > temp) {
			ans = temp;
		} ans > temp ans temp {
			ans = temp;
		} ans = temp ans temp temp = 0 temp 0 temp += Math.abs(a-b) temp Math.abs(a-b) Math.abs Math a-b a b temp += Math.abs(c-a) temp Math.abs(c-a) Math.abs Math c-a c a if (ans > temp) {
			ans = temp;
		} ans > temp ans temp {
			ans = temp;
		} ans = temp ans temp temp = 0 temp 0 temp += Math.abs(c-b) temp Math.abs(c-b) Math.abs Math c-b c b temp += Math.abs(a-c) temp Math.abs(a-c) Math.abs Math a-c a c if (ans > temp) {
			ans = temp;
		} ans > temp ans temp {
			ans = temp;
		} ans = temp ans temp temp = 0 temp 0 temp += Math.abs(a-c) temp Math.abs(a-c) Math.abs Math a-c a c temp += Math.abs(b-a) temp Math.abs(b-a) Math.abs Math b-a b a if (ans > temp) {
			ans = temp;
		} ans > temp ans temp {
			ans = temp;
		} ans = temp ans temp temp = 0 temp 0 temp += Math.abs(b-c) temp Math.abs(b-c) Math.abs Math b-c b c temp += Math.abs(a-b) temp Math.abs(a-b) Math.abs Math a-b a b if (ans > temp) {
			ans = temp;
		} ans > temp ans temp {
			ans = temp;
		} ans = temp ans temp System.out.println(ans) System.out.println System.out System System.out ans sc1.close() sc1.close sc1 String[] args args public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner sc1 = new Scanner(System.in);
		int a = sc1.nextInt();
		int b = sc1.nextInt();
		int c = sc1.nextInt();
		int temp = 0;
		int ans = 0;

		//123
		ans += Math.abs(b-a);
		ans += Math.abs(c-b);

		//132
		temp += Math.abs(c-a);
		temp += Math.abs(b-c);
		if (ans > temp) {
			ans = temp;
		}

		//213
		temp = 0;
		temp += Math.abs(a-b);
		temp += Math.abs(c-a);
		if (ans > temp) {
			ans = temp;
		}


		//231
		temp = 0;
		temp += Math.abs(c-b);
		temp += Math.abs(a-c);
		if (ans > temp) {
			ans = temp;
		}

		//312
		temp = 0;
		temp += Math.abs(a-c);
		temp += Math.abs(b-a);
		if (ans > temp) {
			ans = temp;
		}

		//321
		temp = 0;
		temp += Math.abs(b-c);
		temp += Math.abs(a-b);
		if (ans > temp) {
			ans = temp;
		}


		System.out.println(ans);

		sc1.close();

	}

}