/in/foo.cc: In function 'void dfs()':
/in/foo.cc:71:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for( int i = 0; i < G[v].size(); i++){
                         ~~^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:117:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for( int j = 0; j < G[i].size(); j++){
                         ~~^~~~~~~~~~~~~
/in/foo.cc:127:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for( int k = 0; k < G[temp.to].size(); k++){
                             ~~^~~~~~~~~~~~~~~~~~~
/in/foo.cc:132:48: warning: 'indaxTemp2' may be used uninitialized in this function [-Wmaybe-uninitialized]
             edge &temp2 = G[temp.to][indaxTemp2];
                                                ^