n = read_line.to_i
m = read_line.to_i
s = Array.new(m) do
  cs = read_line.chars
  a = Array.new(4, 0u64)
  n.times do |i|
    if cs[i] == '1'
      a[i >> 6] |= 1u64 << (i & 0x3F)
    end
  end
  a
end
ans = Array.new(n) { Array.new(4, 0u64) }
m.times do |i|
  n.times do |j|
    if s[i][j >> 6].bit(j & 0x3F) == 0
      ans[j][0] |= s[i][0]
      ans[j][1] |= s[i][1]
      ans[j][2] |= s[i][2]
      ans[j][3] |= s[i][3]
    else
      ans[j][0] |= ~s[i][0]
      ans[j][1] |= ~s[i][1]
      ans[j][2] |= ~s[i][2]
      ans[j][3] |= ~s[i][3]
    end
  end
end
n.times do |i|
  ans[i][i >> 6] |= 1u64 << (i & 0x3F)
  n.upto(255) do |j|
    ans[i][j >> 6] |= 1u64 << (j & 0x3F)
  end
  if !ans[i].all? { |v| v == UInt64::MAX }
    puts "No"
    exit
  end
end
puts "Yes"