program Project2;

{$APPTYPE CONSOLE}

uses
  SysUtils;
 var n,k,i,j,max,x: integer;
 a: array [0..10000,0..10000] of integer;
begin
  { TODO -oUser -cConsole Main : Insert code here }
  assign(input,'legacy.in');
  reset(input);
  readln(n,k);
  for i:=1 to n do
    for j:=1 to n do
    read(a[i,j]);
  assign(output,'legacy.out');
  rewrite(output);
  max:=0 ;
  for j:=1 to n do
  begin
   if a[2,j]>max then max:=a[2,j];
  end;
 x:=n*max;
 writeln(x);
end.