Hi. I saw many summer schools in bioinformatics fields at heidelberg university. Please check heidelberg university.

The list for previous year (I believe the new application will be accepted later this year/beginning of the new one):

https://thiagoserra.com/2017/02/20/summer-2017-schools-on-algorithms-combinatorics-learning-optimization-and-other-relevant-orms-topics/

I do not know about summer schools, but there is a terrific course that you can go through on YouTube called "Divide & Conquer,

https://www.youtube.com/watch?v=x78uQu730b0

Lewis : I need a PhD. summer school, the one you recommended is for bachelor students..

Check here:

https://www.mpi-inf.mpg.de/departments/algorithms-complexity/adfocs/