Compilare: main.cpp: In function 'int dfs(int)': main.cpp:52:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = 0 ; i < adj_list[node].size() ; i++) //for each adjacent vertex with node | ~~^~~~~~~~~~~~~~~~~~~~~~~