Compilare: user.cpp: In function ‘void costmin()’: user.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp:25:22: warning: unused variable ‘j’ [-Wunused-variable] int prim,ultim,i,j,x,y; ^ user.cpp:25:26: warning: unused variable ‘y’ [-Wunused-variable] int prim,ultim,i,j,x,y; ^ user.cpp: In function ‘void testare(int)’: user.cpp:60:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp:48:24: warning: unused variable ‘j’ [-Wunused-variable] int prim,ultim,x,i,j; ^ user.cpp: In function ‘int main()’: user.cpp:105:15: warning: unused variable ‘b’ [-Wunused-variable] int m,i,a,b,aux; ^