{ll a,b,c,d,p,q,r,y,e=MD,f=-e;rd(a,b,c,d,p,q);rep(x,p,q+1)y=((a*x+b)*x+c)*x+d,e>y?p=x,e=y:0,f<y?r=x,f=y:0;wt(f,r,e,p);}