#include <NTL/mat_RR.h>NTL_CLIENTint main(){   mat_RR A;   vec_RR x, y, z;   RR d;   RR::SetPrecision(200);   cin >> A;   cin >> y;   solve(d, x, A, y);   // mul(z, x, A);   // sub(z, z, y);   z = x*A - y;   cout << d << "\n";   cout << x << "\n";   cout << z << "\n";}