Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:61:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i=0; i<la[x].size(); ++i) | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:111:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::set<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 111 | for(int i=0; i<biconexe.size(); ++i) | ~^~~~~~~~~~~~~~~~