Compilare: main.cpp: In function 'void dfs(int)': main.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i = 0;i<G[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<G[nod].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:12: warning: 'root' may be used uninitialized [-Wmaybe-uninitialized] 49 | dfs(root); | ~~~^~~~~~ main.cpp:42:13: note: 'root' was declared here 42 | int root; | ^~~~