#include <bits/stdc++.h>
using namespace std;

int main() {
	int x,y,z,cnt=0;
	cin>>x>>y>>z;
	int a=__builtin_popcount(x),b=__builtin_popcount(y),c=__builtin_popcount(z);
	if(a!=b)cnt++;
	if(b!=c)cnt++;
	if(c!=a)cnt++;
	cout<<cnt<<endl;

}