在这种事上带点幽默，有助于打破成见，使事情变得简单。
If you humour it you help to break the barriers and make things easier.
电话在许多方面使事情变得简单，尤其是在移动电话出现以后，通讯变得更加快捷方便。
The telephone makes things easy in many ways. Especially, after the mobile telephone appears, communication becomes easier and rapider.
在评论中已经讨论的，使事情变得简单，你可以添加条目到阵列使其大小两个电源，所以二进制树的所有的叶子，相同的深度。
As already discussed in the comments, to make things simple, you can add entries to the array to make its size a power of two, so the binary tree has the same depth for all leaves.
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