Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:38:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (i=0; i<adj[curr].size(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(long long int, long long int)': main.cpp:53:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (i=0; i<adj[curr].size(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:19: warning: unused variable 'j' [-Wunused-variable] 67 | long long n,i,j,k,l,a,b; | ^ main.cpp:67:21: warning: unused variable 'k' [-Wunused-variable] 67 | long long n,i,j,k,l,a,b; | ^ main.cpp:67:23: warning: unused variable 'l' [-Wunused-variable] 67 | long long n,i,j,k,l,a,b; | ^