/usr/share/doc/libboost1.74-doc/examples/libs/polygon/example/input_data/primary/primary_030.txt

0
12
-1 10 1 10
10 -1 10 1
-1 -10 1 -10
-10 -1 -10 1
-6 8 -2 11
-8 6 -11 2
6 8 2 11
8 6 11 2
6 -8 2 -11
8 -6 11 -2
-6 -8 -2 -11
-8 -6 -11 -2

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