/usr/share/doc/coinor-libflopc++-dev/AUTHORS is in coinor-libflopc++-dev 1.0.6-3.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/coinor-libflopc++-dev/../coinor-libflopc++0/AUTHORS
/usr/share/doc/coinor-libflopc++-dev/../coinor-libflopc++0/AUTHORS