Compilare: main.cpp: In function 'void dfs1(int, int)': main.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<adj[node].size(); i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:36:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<adj2[node].size(); i++) ~^~~~~~~~~~~~~~~~~~