package com.codegym.task.task04.task0428;
/*
Positive number
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
//write your code here
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String x = reader.readLine();
String y = reader.readLine();
String z = reader.readLine();
int a = Integer.parseInt(x);
int b = Integer.parseInt(y);
int c = Integer.parseInt(z);
if((a<0&&b>0&&c>0) || (a>0&&b<0&&c>0) || (a>0&&b>0&&c<0))
{
System.out.println("2");
}
else if((a<0&&b<0&&c>0) || (a<0&&b>0&&c<0) || (a>0&&b<0&&c<0))
{
System.out.println("1");
}
else
{
System.out.println("0");
}
}
}