Wrong Answer
/in/foo.cc: In function 'bool spfa(int)':
/in/foo.cc:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < E[temp].size(); i++)
~~^~~~~~~~~~~~~~~~
/in/foo.cc: In function 'bool spfa(int)':
/in/foo.cc:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < E[temp].size(); i++)
~~^~~~~~~~~~~~~~~~
