/in/foo.cc: In function 'bool check(Graph, int, std::vector<Army>, int)':
/in/foo.cc:169:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (remain.size() > map.NodeTable[1].army)
      ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:174:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0, j =0,remainsize = remain.size(); i < root.size(); i++)
                                                   ~~^~~~~~~~~~~~~
/in/foo.cc:197:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (root.size() - i - 1 < remainsize)
       ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~