3 practice

#include <iostream>
#include <math.h>
using namespace std;
int main()
{
    float a, b, x, y;
    cin >> a >> b;
    if (a < 0) a = a * (-1.0);
    if (b < 0) b = b * (-1.0);
    x = (a + b) / 2;
    y = sqrt(a * b);
    x = round(x * 1000.0) / 1000.0;
    y = round(y * 1000.0) / 1000.0;
    cout << x << " " << y;
}