Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:15:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<g[nod].size(); i++) ^ user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<g[nod].size(); i++) ^ user.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<=g[nod].size(); i++){ ^ user.cpp:14:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^