Arithmetic mean

You are given two integers $a$ and $b$. Find their arithmetic mean, that is $\dfrac{a + b}{2}$.

A single line with two integers $a$ and $b$ ($-10^6 \le a, b \le 10^6$).

A single number — the mean with exactly 2 digits after the decimal point (for example, 3.50 or -2.00).

In C++ and Go dividing two integers gives an integer: 7 / 2 is 3. To keep the fractional part, divide by a floating-point number: (a + b) / 2.0.

Printing with 2 digits: Python — print(f"{x:.2f}"), C++ — printf("%.2f\n", x), Go — fmt.Printf("%.2f\n", x).