> Expensive to calculate, cheap to validate Sounds like NP-completeness [1] [1] https://en.wikipedia.org/wiki/NP-completeness https://en.wikipedia.org/wiki/NP

> Expensive to calculate, cheap to validate Sounds like NP-completeness [1] [1] https://en.wikipedia.org/wiki/NP-completeness https://en.wikipedia.org/wiki/NP-completeness