#include <iostream>
#include <iterator>
#include <sstream>
#include <string>
#include <vector>

using namespace std;

int main() {
	istringstream iss("2.3 4.3 5.6 2.1 4.4 3.1");
	std::istream_iterator<double> eos;              // end-of-stream iterator
    std::istream_iterator<double> iit(iss); 
	vector<double> res(iit, eos);
    cout << res.size() << endl;
	return 0;
}