#include <iostream>
using namespace std;
int main(){
int pare=0, a, b, c;
//Citeste date
cin >> a >> b >> c;
//Incrementeaza variabila pare daca numerele sunt pare
if(a%2==0) pare++;
if(b%2==0) pare++;
if(c%2==0) pare++;
//Afiseaza rezultat
cout << pare;
}