s1=0;s2=0;n1 =0;n2=0 ;
x=[1,-4,-8,3,10,-9,7,-3,10, 8,-5,-2,2,0];
m=length(x);
for i=1:m
    if x(i)<0
        s1=s1+x(i);
        n1=n1+1;
    else
        s2=s2+x(i);
        n2=n2+1;
    end
end
s1,n1 ,s2,n2,m