Permissions of all files and directories in /usr

Oh my.. I just did a terrible mistake: chown -R root:root /usr. Mea [maxima] culpa.. I fixed sudo and pkexec already, but I want to be sure, there is no "sleeping" issue waiting on me in the future. Could anyone please find out using simple command, what files / directories have 'special' permissions? I know about /usr/bin/sudo, /usr/bin/pkexec and /usr/lib/policykit-1 only. Thanks.. I'm using Debian 11..