/usr/share/php/Composer/DependencyResolver/ is in composer 1.0.0~beta2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Composer/DependencyResolver/Decisions.php
/usr/share/php/Composer/DependencyResolver/DefaultPolicy.php
/usr/share/php/Composer/DependencyResolver/Operation/
/usr/share/php/Composer/DependencyResolver/Operation/InstallOperation.php
/usr/share/php/Composer/DependencyResolver/Operation/MarkAliasInstalledOperation.php
/usr/share/php/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php
/usr/share/php/Composer/DependencyResolver/Operation/OperationInterface.php
/usr/share/php/Composer/DependencyResolver/Operation/SolverOperation.php
/usr/share/php/Composer/DependencyResolver/Operation/UninstallOperation.php
/usr/share/php/Composer/DependencyResolver/Operation/UpdateOperation.php
/usr/share/php/Composer/DependencyResolver/PolicyInterface.php
/usr/share/php/Composer/DependencyResolver/Pool.php
/usr/share/php/Composer/DependencyResolver/Problem.php
/usr/share/php/Composer/DependencyResolver/Request.php
/usr/share/php/Composer/DependencyResolver/Rule.php
/usr/share/php/Composer/DependencyResolver/RuleSet.php
/usr/share/php/Composer/DependencyResolver/RuleSetGenerator.php
/usr/share/php/Composer/DependencyResolver/RuleSetIterator.php
/usr/share/php/Composer/DependencyResolver/RuleWatchChain.php
/usr/share/php/Composer/DependencyResolver/RuleWatchGraph.php
/usr/share/php/Composer/DependencyResolver/RuleWatchNode.php
/usr/share/php/Composer/DependencyResolver/Solver.php
/usr/share/php/Composer/DependencyResolver/SolverBugException.php
/usr/share/php/Composer/DependencyResolver/SolverProblemsException.php
/usr/share/php/Composer/DependencyResolver/Transaction.php