Compilare: user.cpp: In function ‘int main()’: user.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<d.size();i++) ^ user.cpp:32:66: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x1<=lg/2&&x2>=lg/2) out<<lg/2-x1+1<<" "<<'S'<<'\n'<<x2-lg/2<<" "<<'D'<<'\n'; ^ user.cpp:31:5: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x1>lg/2&&x2>lg/2) out<<x2-lg/2<<" "<<'D'<<'\n'<<x1-lg/2<<" "<<'D'<<'\n'; ^