Compilare: user.cpp: In function ‘int main()’: user.cpp:87:61: warning: unused variable ‘ok’ [-Wunused-variable] int a[Nmax][Nmax],n,m,xr,yr,xj,yj,b[Nmax][Nmax],i,j,ok=0,mij,x_final,y_final,Min; ^~ user.cpp:87:66: warning: variable ‘mij’ set but not used [-Wunused-but-set-variable] int a[Nmax][Nmax],n,m,xr,yr,xj,yj,b[Nmax][Nmax],i,j,ok=0,mij,x_final,y_final,Min; ^~~ user.cpp:111:46: warning: ‘y_final’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<Min<<" "<<x_final<<" "<<y_final; ^ user.cpp:111:34: warning: ‘x_final’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<Min<<" "<<x_final<<" "<<y_final; ^~~