package com.javarush.task.task04.task0424;
import java.io.BufferedReader;
import java.io.InputStreamReader;
/*
Три числа
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int a = Integer.parseInt(reader.readLine());
int b = Integer.parseInt(reader.readLine());
int c = Integer.parseInt(reader.readLine());
if (a != b && a != c && b == c) {
System.out.println("1");
}
else if (b!=a && b!=c && a==c){
System.out.println("2");
}
else if (c!=a && c!=b && a==b){
System.out.println("3");
}
}
}