4

Part of 2001 German National Olympiad

Problems(1)

In how many ways can the Nikolaus House be drawn

Source: Germany 2001 p4

In how many ways can the ”Nikolaus’ House” (see the picture) be drawn? Edges may not be erased nor duplicated, and no additional edges may be drawn. https://cdn.artofproblemsolving.com/attachments/0/5/33795820e0335686b06255180af698e536a9be.png

combinatorial geometrycombinatorics