var
  a : array [1..15,1..20] of longint;
  i, j, n, m, sum : longint;
begin
  readln(n);
  readln(m);
  sum:=0;
  for i:=1 to n do
    for j:=1 to m do
      read(a[i,j]);
      sum:=sum+a[i,j];
  writeln(sum);
end.