#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    enum { FACTOR = 3 };
    double d = 1.0 / FACTOR;
    double d_i = int(d * FACTOR);
    int i_t = std::trunc(d * FACTOR);
    double d_r = std::round(d * FACTOR);
    cout << d_i << " vs " << i_t << " vs " << d_r << endl;
    return 0;
}