/in/foo.cc: In function 'int main()':
/in/foo.cc:99:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (unsigned int j = 0; j < size; j++)
                                  ~~^~~~~~
/in/foo.cc:113:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (dep[x].size() < SIZE) {
                 ~~~~~~~~~~~~~~^~~~~~