UT Invitational Programming Contest 2019

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2019-05-04 10:00 AKDT

## UT Invitational Programming Contest 2019

#### End

2019-05-04 15:00 AKDT
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# Problem GElevators

Whenever a new building is built, it must comply with all the relevant building regulations. In particular, there are rules governing the number of elevators a building must have depending on its number of floors and zoning district.

If a building has only one floor, it doesn’t need any elevators; otherwise, it needs more elevators the more floors it has, and the exact number depends on its zoning district. The following tables describe the number of elevators necessary for a building in each of the residential, commercial, and industrial zoning districts.

 Residential Commercial Industrial Floors Elevators Floors Elevators Floors Elevators $1$ $0$ $1$ $0$ $1$ $0$ $2-5$ $1$ $2-7$ $1$ $2-4$ $1$ $6-10$ $2$ $8-14$ $2$ $5-8$ $2$ $11-15$ $3$ $15-20$ $3$ $9-12$ $3$ $16-20$ $4$ $13-16$ $4$ $17-20$ $5$
Table 1: Elevator requirements by zone

You are given the zoning district of a new building and how many floors it has. How many elevators does it need?

## Input

The only line of input contains a string representing the zoning district of the building (“residential”, “commercial”, or “industrial”), followed by a space and an integer $N$ ($1 \leq N \leq 20$), the number of floors the building has.

## Output

Output a single integer: the number of elevators the building must have.

Sample Input 1 Sample Output 1
residential 6

2

Sample Input 2 Sample Output 2
industrial 20

5