Compilare: main.cpp: In function 'bool bf()': main.cpp:73:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<varf>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for (i=0; i<G[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'void afis()': main.cpp:92:12: warning: unused variable 'j' [-Wunused-variable] 92 | int i, j, cnt; | ^ main.cpp:92:15: warning: unused variable 'cnt' [-Wunused-variable] 92 | int i, j, cnt; | ^~~