Bahrain International Circuit that sand would blow onto the circuit and disrupt the race. However, organizers were able to keep the sand off the track by spraying an adhesive on the sand around the track. The surface of the track is made of graywacke aggregate, shipped to Bahrain from Bayston Hill quarry in Shropshire, England. The surface material is highly acclaimed by circuit bosses and Formula 1 drivers for the high level of grip it offers. The same aggregate material is used at the Yas Marina Circuit for the Abu Dhabi Grand Prix. The DRS zone is on the pit straight at the
Circuit satisfiability problem finding inputs that make the circuit output 1. (The converse, that SAT is reducible to CircuitSAT, is even easier—we simply rewrite the Boolean formula as a circuit and solve that.) Circuit satisfiability problem In theoretical computer science, the circuit satisfiability problem (also known as CIRCUIT-SAT, CircuitSAT, CSAT, etc.) is the decision problem of determining whether a given Boolean circuit has an assignment of its inputs that makes the output true. CircuitSAT has been proven to be NP-complete. In fact, it is a prototypical NP-complete problem; the Cook–Levin theorem is sometimes proved on CircuitSAT instead of on SAT for Boolean expressions