Program Flip1;
var c, l, i, j:byte;
    a:array [1..16,1..16] of longint;
    s, s1, s2:longint;
    f, g:text;
begin
assign(f, 'flip.in'); assign(g, 'flip.out');
reset(f); rewrite(g);
read(f, c, l);
For i:=1 to c do For j:=1 to l do read(f, a[c][j]);
For i:=1 to c do begin
                 For j:=1 to l do s1:=s1+a[c][l];
                 For j:=1 to l do s2:=s2-a[c][l];
                 if s1<s2 then s:=s+s2
                          else s:=s+s1;
                 s1:=0; s2:=0;
                 end;
write(g, s);
close(f); close(g);
end.