Learning about different problem solving strategies and when to use them will give you a good start. Problem solving is a process. Most strategies provide steps that help you identify the problem and choose the best solution. There are two basic types of strategies: algorithmic and heuristic.
It should be 'No vacancies' (plural). Vacant means empty/free. Vacancy is the state of being empty, therefore 'no vacancies' = no empty rooms.
nonÂ·reÂ·newÂ·aÂ·ble. adj. 1. That cannot be renewed: a nonrenewable license. 2.onÂ·reÂ·newÂ·aÂ·ble. adj. 1. That cannot be renewed: a nonrenewable license. 2.