local n, m = io.read("*n", "*n")
local cnt = {}
for i = 1, n do
  cnt[i] = 0
end
local score, name = {}, {}
for i = 1, m do
  score[i] = 0
  name[i] = {}
end
local ret = 0
for i = 1, n do
  for j = 1, m do
    local rij = io.read("*n")
    if score[j] == rij then
      table.insert(name[j], i)
      cnt[i] = cnt[i] + 1
      if cnt[i] == 1 then
        ret = ret + 1
      end
    elseif score[j] < rij then
      for k = 1, #name[j] do
        local z = name[j][k]
        cnt[z] = cnt[z] - 1
        if cnt[z] == 0 then ret = ret - 1 end
      end
      score[j] = rij
      name[j] = {i}
      cnt[i] = cnt[i] + 1
      if cnt[i] == 1 then ret = ret + 1 end
    end
  end
  print(ret)
end