Compilare: main.cpp: In function 'void DFS(int)': main.cpp:23:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i = 0; i < adj[v].size(); ++i) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:13: warning: unused variable 'prev' [-Wunused-variable] 30 | int n,m,prev,cur; | ^~~~ main.cpp:30:18: warning: unused variable 'cur' [-Wunused-variable] 30 | int n,m,prev,cur; | ^~~