This is LaTeX code:
[latex]
f_x(q) = \left\{ \begin{array}{l l} 0 & \quad \mbox{za $q<x$ i za $q=x+1$}\\ 1 & \quad \mbox{za $q \geq x$, $q \neq x+1$}\\ \end{array} \right.
[/latex]