K f(I r,K x){K y=e(r,x);R r-yu?MV(t(x),r,y):y;}K E(I r,K x)…
K f(I r,K x){K y=e(r,x);R r-yu?MV(t(x),r,y):y;}K E(I r,K x){I i=xn-1;K z=e(r,Xx),y=kK(i--);r=zu,Yx=z;W(i--)Yx=e(0,xK[i+1]);R u(r,sS(0,y));}
K f(I r,K x){K y=e(r,x);R r-yu?MV(t(x),r,y):y;}K E(I r,K x){I i=xn-1;K z=e(r,Xx),y=kK(i--);r=zu,Yx=z;W(i--)Yx=e(0,xK[i+1]);R u(r,sS(0,y));}