Wrong Answer
/in/foo.cc: In function 'void DFS(int, int)':
/in/foo.cc:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<S[Hao].size();i++)
~^~~~~~~~~~~~~~
/in/foo.cc: In function 'void DFS(int, int)':
/in/foo.cc:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<S[Hao].size();i++)
~^~~~~~~~~~~~~~
