Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:38:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:57:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:70:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[nod].size();i++) ~^~~~~~~~~~~~~~~~