README.md in union_find_tree-0.1.0 vs README.md in union_find_tree-0.1.1

@@ -1,5 +1,7 @@
+[![wercker status](https://app.wercker.com/status/71ca0846f5e839b6841e1f44cf3cfb15/m/master "wercker status")](https://app.wercker.com/project/byKey/71ca0846f5e839b6841e1f44cf3cfb15)
+
 # UnionFindTree
 
 Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/union_find_tree`. To experiment with that code, run `bin/console` for an interactive prompt.
 
 TODO: Delete this and the text above, and describe your gem
@@ -19,10 +21,14 @@
 Or install it yourself as:
 
     $ gem install union_find_tree
 
 ## Usage
+This tree's data size is dynamic variable.  
+If you want to use this library to programming contests, you can copy and paste from lib/union_find_tree.rb
+
+example1
 ```ruby
 require 'union_find_tree'
 include UnionFindTree
 
 tree =  UnionFind.new
@@ -31,11 +37,29 @@
 tree.same?(2,3) #=> false
 tree.size(1) #=> 2
 tree.size(3) #=> 1
 
 ```
-This tree's data size is dynamic variable.  
-If you want to use this library to programming contests, you can copy and paste from lib/union_find_tree.rb
+
+you can add any object.
+
+example2
+```ruby
+require 'union_find_tree'
+include UnionFindTree
+
+tree =  UnionFind.new
+o1 = Array.new(1)
+o2 = Array.new(2)
+o3 = Array.new(3)
+tree.unite(o1,o2)
+tree.same?(o1,o2) #=> true
+tree.same?(o1,o3) #=> false
+tree.size(o1) #=> 2
+tree.size(o3) #=> 1
+
+```
+
  
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.