Compilare: user.cpp: In function ‘void cit()’: user.cpp:19:12: warning: unused variable ‘x’ [-Wunused-variable] int i, j, x, y; ^ user.cpp:19:15: warning: unused variable ‘y’ [-Wunused-variable] int i, j, x, y; ^ user.cpp: In function ‘bool cup(int)’: user.cpp:91:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < V[n].size(); i++) ^ user.cpp:102:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < V[n].size(); i++) ^