Think about representations for E and S

[SebastianSchlag]

Depending on the operations we actually need, we could represent E and S either as

• bitvectors of size |# hyperedges| bits
• by saving the incident hyperedges directly

Possible bit vector implemtations:

• vector (might not be usable if we need bit operations)
• boost:dynamic_bitset
• one of SDSLs (https://github.com/simongog/sdsl-lite) bitvectors