Compilare: main.cpp: In function 'int main()': main.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Nod>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int i=0;i<v[nod].size();++i){ | ~^~~~~~~~~~~~~~ main.cpp:29:9: warning: variable 'lnod' set but not used [-Wunused-but-set-variable] 29 | int lnod,nod,cnt = 0; | ^~~~ main.cpp:29:18: warning: unused variable 'cnt' [-Wunused-variable] 29 | int lnod,nod,cnt = 0; | ^~~