Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(i=0; i<adj[curr].size(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:52:13: warning: unused variable 'j' [-Wunused-variable] 52 | int n,i,j,k,cer,a,b; | ^ main.cpp:52:15: warning: unused variable 'k' [-Wunused-variable] 52 | int n,i,j,k,cer,a,b; | ^ main.cpp:52:17: warning: unused variable 'cer' [-Wunused-variable] 52 | int n,i,j,k,cer,a,b; | ^~~