Compilare: main.cpp: In function 'void dfs(int)': main.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i=0;i<a[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:25:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i=0;i<a[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp:22:9: warning: unused variable 'k' [-Wunused-variable] 22 | int k=0; | ^