I'm working on the exercises in "Problem Solving in Automata, Languages, and Complexity" and I've run into the below problem. The question asks to construct a CFG for the language , and I just can't figure out the correct way to do that! Could someone offer some Hints or suggestions?
$\{0,1\}^*-\{www~|~w\in\{0,1\}^*\}$