/in/foo.cc: In function 'void dfs(int, int)':
/in/foo.cc:85:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<stor[dp].size();i++)
              ~^~~~~~~~~~~~~~~~
/in/foo.cc:89:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(tmp==stor[dp].size())
     ~~~^~~~~~~~~~~~~~~~~
/in/foo.cc:95:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i=0;i<stor[dp].size();i++)
               ~^~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:120:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=0;i<a[x].size();i++)
                ~^~~~~~~~~~~~