lib C
  fun strtoll(s : UInt8*, p : UInt8**, b : Int32) : Int64
end

class String
  def to_i64
    C.strtoll(self, nil, 10)
  end
end

n, m = read_line.split.map(&.to_i)
a = (1..n).map { read_line.split.map(&.to_i64) }
(0...m).each do |i|
  sum = (0...n).sum { |j| a[j][i] }
  (0...n).each { |j| a[j][i] *= sum }
end
puts a.map(&.sum).sort.reverse.each_slice(2).reduce({0i64, 0i64}) { |acc, x|
  {acc[0] + x[0], acc[1] + x[1]}
}.try { |(x, y)| x - y }