Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:38:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0, f; i < V[n].size(); i++) ^ user.cpp: In function ‘void rez1()’: user.cpp:57:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < LM.size(); i++) ^ user.cpp:59:13: warning: unused variable ‘x’ [-Wunused-variable] int x = LM[i].first; ^ user.cpp:60:13: warning: unused variable ‘y’ [-Wunused-variable] int y = LM[i].second; ^ user.cpp: In function ‘int rez2()’: user.cpp:82:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < VC[n].size(); i++) ^