#include <iostream>
#include <iomanip>
using namespace std; 
int main() {
    double step; 
    double x0 = 1.0; 
    double y0 = 1.0; 
    double diffY; 
    std::cout << std::fixed;
    std::cout << std::setprecision(16);
    cout << "Enter step value: ";
    cin >> step; 
    float eps = step/10000;
    while (x0 <= 2.5 + eps ) {

        diffY = x0 + ((3*y0) / x0);
        cout << x0 << "    " << y0 << "\n"; 
        x0+=step;
        std::cout << x0 << std::endl;
        y0+=step*(diffY);
    }

    return 0; //initially defined the main function to return an int
}