/in/foo.cc: In function 'int doSearch(int, int, int)':
/in/foo.cc:34:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0 ; i < nodes[start].to.size() ; i++)
                   ~~^~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:94:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0 ; i < minRoute.size() ; i++)
                    ~~^~~~~~~~~~~~~~~~~