package com.codegym.task.task04.task0424; /* Three numbers */ import java.io.*; import java.util.Scanner; public class Solution { public static void main(String[] args) throws Exception { BufferedReader index =new BufferedReader (new InputStreamReader(System.in)); int n1=Integer.parseInt(index.readLine()); int n2=Integer.parseInt(index.readLine()); int n3=Integer.parseInt(index.readLine()); int[] a={n1,n2,n3}; if((n1==n2) && (n1!=n3)){ System.out.println(2); }else if((n2==n3) && (n2!=n1)){ System.out.println(0); }else if((n1==n3) && (n3!=n2)){ System.out.println(1); }else{ }} }