 For these cases and P being a simple polygon, we } design efficient algorithms for (i) computing and maintaining \{0^{o\}}  -
<meaning-changed>  For these cases and P being a simple polygon, we } design efficient algorithms for (i) computing and maintaining \{0^{o\}}  -
 For these cases and P being a simple polygon, we } design efficient algorithms for (i) computing and maintaining \{0^{o\}} the \mathcal{O -