Compilare: main.cpp: In function 'void dfs_n(int)': main.cpp:15:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i=0;i<v[nod].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs_tr(int, int)': main.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i=0;i<vt[nod].size();i++){ | ~^~~~~~~~~~~~~~~