Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[node].size();i++) ~^~~~~~~~~~~~~~~~~ main.cpp:27:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj[node].size();i++) ~^~~~~~~~~~~~~~~~~