/in/foo.cc: In function 'void findSame(std::vector<int>)':
/in/foo.cc:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<arr.size();i++)
                 ~^~~~~~~~~~~
/in/foo.cc:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=i;j<arr.size();j++)
                     ~^~~~~~~~~~~