Compilare: main.cpp: In function 'void dfs(int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < adj[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:15: warning: unused variable 'j' [-Wunused-variable] 31 | int c, i, j, a, b, dist; | ^