Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:31:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V[n].size(); i++) ^ user.cpp: In function ‘void dfst(int)’: user.cpp:42:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < VT[n].size(); i++) ^ user.cpp: In function ‘void rez()’: user.cpp:66:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < V[n].size(); i++) ^ user.cpp:86:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < R.size(); i++) ^