/in/foo.cc: In function 'std::vector<int> getSumAbsoluteDifferences(std::vector<int>&)':
/in/foo.cc:5:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < nums.size(); i++)
                     ~~^~~~~~~~~~~~~
/in/foo.cc:7:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < nums.size(); i++)
                     ~~^~~~~~~~~~~~~