Minimize nested loops

I have the following code with nested loops. How can I minimize the loop?

users result is like:

=> [[35, 61, 62, 63, 64, 65, 66, 67, 68, 69, nil, 70, 71, 72, 73, 74, 75, 78, 79, 92, 94, 95, 154, 164, 292, 293, 294, 295, 314], [], [35], [], [35, 79, 88], [], [], [36, 35, 56, 78, 87, 95, 65], [63, 72, 78, 80, 81, 82, 84, 87, 90, 93, nil, 96, 111, 157, 159, 160, 271, 272, 66, 295, 296, 297, 298, 299, 300, 301, 305, 307, 308, 71, 315], [], [79, 83, 85, 86, 89, 91, 161, 162, 163, 67, 294, 302, 303, 304, 306, 309, 310, 311, 312, 313], [], [314], [314], []]

That's why I need to loop the object in each elements.

And array value is:

=> [309, 310, 305, 304, 90, 162, 78, 297, 296, 272, 271, 84, 91, 308, 299, 79, 87, 298, 301, 163, 81, 72, 83, 111, 86, 313, 164, 300, 159, 315, 160, 307, 82, 69, 312, 89]

Thanks!

0.upto(users.count).each do |i|
  users[i].each do |user_id|
    if array.include?(user_id)
      puts user_id
    end
  end
end