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