**i was solving 320E . the problem required some convex hull optimization.**

i searched on web i got these blogs :

**what are the difference between above three , and how many more are there . which hull to study (i think 3) to solve this .**

**what is convex hull and where to apply. Are there different algorithms for different questions**

Also this link is not working , does anyone know what was in that : http://wcipeg.com/wiki/Convex_hull_trick

Please tell !