Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:47:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, f, k; i < V[n].size(); i++) ^ user.cpp: In function ‘void rez()’: user.cpp:103:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < V[n].size(); i++) ^ user.cpp:71:12: warning: variable ‘f’ set but not used [-Wunused-but-set-variable] int n, i, f, k; ^ user.cpp:71:15: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int n, i, f, k; ^