Compilare: main.cpp: In function 'void dragonfs(int, int)': main.cpp:15:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(i=0; i<v[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:22:11: warning: unused variable 'j' [-Wunused-variable] 22 | int i,j; | ^