Compilare: main.cpp: In function 'void dfs(int)': main.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i=0;i<adj[nod].size();i++) | ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int union_set(int, int)': main.cpp:81:1: warning: no return statement in function returning non-void [-Wreturn-type] 81 | } | ^