Friends At Cafeteria

Friends At Cafeteria

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The school cafeteria has a long rectangular table. Students can sit along long sides at the table and each student sits facing a student sitting on the opposite side of him.

Luiza's group of friends has an even number of members and they would like to sit all together at the table. However, this is very difficult to coordinate, since the cafeteria is always crowded. Therefore, the group of friends decided that they will be happy if each member of the group is seated facing another member of the group.

The friends sat down and are already evenly divided between the two sides of the table,...

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