 Pi. It is guaranteed that Pi&lt;i.</div>
<div>Finally m lines follow with a description of the files in the file system. The j-th of those lines describes the file number j and consists of two integers: Pj and Lj. They specify that the file numberj has a name of length Lj and its parent directory has number Pj.</div>
<div>All files and directories will have names with positive length, and their absolute file paths will be at most k characters long.</div>
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