Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:30:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int lca(int, int)': main.cpp:86:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^