q198453237

#include <iostream>
#include <iomanip>
#include <math.h>

using namespace std;

int main()
{
    int a, b, c;
    cin >> a >> b >> c;

    for (int i = a; i <= b; i += c)
    {
        cout << setw(8) << i;
        cout << setprecision(8) << setw(16) << sqrt(i*i + 4) << endl;
    }

    return 0;
}