#include using namespace std; typedef long long ll; typedef pair P; #define REP(i,n) for(int i=0;i> a >> b >> c >> d; int v=a*a+b*c; int y=a*b+b*d; int z=a*c+d*c; int u=b*c+d*d; x[0][0]=v*a+y*c; x[0][1]=v*b+y*d; x[1][0]=z*a+u*c; x[1][1]=z*b+u*d; cout << x[0][0] << ' ' << x[0][1] << endl; cout << x[1][0] << ' ' << x[1][1] << endl; return 0; }