# Partner Units

## Problem description

Partner unit problem describes a people counting system.

The problem includes three types of components, namely a door sensor, a zone and a communication unit. The problem requirements are:

- Each zone as well as each door sensor must be connected to exactly one unit;
- Each unit can control at most two door sensors and at most two zones;
- If a unit controls a door sensor that contributes to a zone controlled by another unit, then the two units must be connected directly, i.e. one unit becomes a partner unit of the other and vice versa;
- Each unit can have at most maxPU partner units which is constant for each problem instance.

The solution of the partner unit problem is defined as follows:

- Given a consistent configuration of door sensors and zones, a number of available units lower and a constant maxPU, find a valid assignment of units that satisfies all requirements.

## Input format

## Output format

## Example

## Author(s)

- Anna Ryabokon
- Alpen-Adria University, Austria

- Andreas Falkner
- Siemens AG

- Gerhard Friedrich
- Alpen-Adria University, Austria