/in/foo.cc: In member function 'void Cow::tarjan(int)':
/in/foo.cc:37:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0; i<graph[k].size(); i++){
~^~~~~~~~~~~~~~~~
/in/foo.cc: In member function 'void Cow::dfs(int)':
/in/foo.cc:62:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0; i<graph2[k].size(); i++){
~^~~~~~~~~~~~~~~~~
/in/foo.cc: In member function 'void Cow::resolve()':
/in/foo.cc:83:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0; j<graph[i].size(); j++){
~^~~~~~~~~~~~~~~~