k=0 for i=1:1000 for j=1:1000 if (i-10)^2+(j-10)^2<35 k=k+1; end if (i-10)^2+((j-10)^2)/4<50 k=k+1; end if (i-10)^2+(j-10)^2<35 if (i-10)^2+((j-10)^2)/4<50 k=k-1; end end end end