Compilare: user.cpp: In function ‘void Salv()’: user.cpp:55:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<a[j].size(); k++) ^ user.cpp:51:17: warning: unused variable ‘minim’ [-Wunused-variable] int k,j,fiu,minim,i; ^ user.cpp: In function ‘int main()’: user.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[0].size(); i++) ^