var
  a : array [1..n,1..n] of longint;
  i,j,min,n : longint;
begin
  readln(n);
  for i:=1 to n do
    for j:=1 to n do
      readln(a[i,j]);
    min:=a[1,1];
  for i:=1 to n do begin
    min:=a[i,i];
    min:='0';
  writeln(a[i,j]);
  writeln;
  end;
end.