Compilare: user.cpp: In function ‘void BellF()’: user.cpp:52:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[w].size(); i++) ^ user.cpp: In function ‘void Salv()’: user.cpp:69:11: warning: variable ‘minim’ set but not used [-Wunused-but-set-variable] int i,minim,j; ^ user.cpp:69:17: warning: unused variable ‘j’ [-Wunused-variable] int i,minim,j; ^