Im not good at maths but to get my work done this books helped me a lot:

https://www.amazon.de/Problem-Solving-Algorithms-Structures-... If I remember correctly it is Python 2

https://www.amazon.de/Algorithms-Illuminated-Part-1-Basics/d...

https://www.amazon.de/Algorithms-Illuminated-Part-Graph-Stru...

https://www.amazon.de/Algorithms-Illuminated-Part-Dynamic-Pr...