Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:25:29: 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] 25 | for (long long i = 0; i < adj[nod].size(); ++i) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:24: warning: unused variable 'j' [-Wunused-variable] 57 | long long n, m, i, j, a, b; | ^