#include <iostream>
#include <cmath>
#include <iomanip>
 
using namespace std;
 
int main()
{
    int n;
    int i=1;
    double h;
    double x_n;
    double y_n;
 
    cout << "Enter n: " ;
    cin >> n;
    cout << endl << "Enter h: " ;
    cin >> h;
    cout << endl << "Enter x_0: ";
    cin >> x_n;
    cout << endl << "Enter y_0: ";
    cin >> y_n;
 
    cout << "n=" << i << " x=" << x_n << " y=" << y_n << endl;
    ++i;
 
    while(i<n+1)
    {
        y_n = y_n + 3*x_n*h*y_n;        
        x_n = x_n + h;
        cout << "n=" << i << " x=" << x_n << " y=" << setprecision(6) << y_n << endl;
        ++i;
    }
    return(0);
}

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