Question 2
Find all functions $f : \mathbb{R} \to \mathbb{R}$ such that
$$
f(x + y) + y \le f(f(f(x)))
$$
for all $x, y \in \mathbb{R}$.
$$
f(x + y) + y \le f(f(f(x)))
$$
for all $x, y \in \mathbb{R}$.
MathNet 2013 Question 2
Math Olympiad Vault · MathNet 2013