Compilare: main.cpp: In function 'int main()': main.cpp:130:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 130 | for (int i = 0; i < sccs.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:132:29: warning: variable 'cand' set but not used [-Wunused-but-set-variable] 132 | int cand = try_dfs(i,0); | ^~~~