var n,i,m,j,ans:integer;
    a:array[1..100, 1..100]of integer;
begin
    readln(n, m);
    for i:=1 to n do
       for j:=1 to m do
         read(a[i,j]);

    ans:=a[1,m];

    for i:=2 to n do
       if (a[i, m+1-i] > ans) then
           ans:=a[i, m+1-i];

    writeln(ans);
end.