import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
	
	public static void main (String[] args) throws java.lang.Exception {

		Scanner scanner = new Scanner(System.in);
		int a = scanner.nextInt();
		int b = scanner.nextInt();
		int c = scanner.nextInt();
		int result;
		
		/*if (a == b && b == c && a == c) {
			System.out.print(1);
		}
		else if (a == b || b == c || a == c) {
			System.out.print(2);
		}
		else {
			System.out.print(3);
		}*/
		
		result = (a == b && b == c && a == c) ? 1 : (a == b || b == c || a == c) ? 2 : 3;
		
		System.out.print(result);

	}
}