/usr/ is in libplanarity-dev 3.0.0.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/planarity/
/usr/include/planarity/appconst.h
/usr/include/planarity/graph.h
/usr/include/planarity/graphDrawPlanar.h
/usr/include/planarity/graphDrawPlanar.private.h
/usr/include/planarity/graphExtensions.h
/usr/include/planarity/graphExtensions.private.h
/usr/include/planarity/graphFunctionTable.h
/usr/include/planarity/graphK23Search.h
/usr/include/planarity/graphK23Search.private.h
/usr/include/planarity/graphK33Search.h
/usr/include/planarity/graphK33Search.private.h
/usr/include/planarity/graphK4Search.h
/usr/include/planarity/graphK4Search.private.h
/usr/include/planarity/graphStructures.h
/usr/include/planarity/listcoll.h
/usr/include/planarity/planarity.h
/usr/include/planarity/platformTime.h
/usr/include/planarity/stack.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/share/
/usr/share/doc/
/usr/share/doc/libplanarity-dev/
/usr/share/doc/libplanarity-dev/copyright
/usr/lib/x86_64-linux-gnu/libplanarity.so
/usr/share/doc/libplanarity-dev/changelog.Debian.gz