Added DNF Sort algorithm in java, cpp and js

[ikaushiksharma]

HacktoberFest 22

AlgoHeist22: Sorting

Algorithm you like to add

DNF Sort

Programming Language for Algorithm Implementation

C++, Java, JavaScript

Code file name with extension

dnf_sort/dnf_sort.cpp dnf_sort/dnf_sort.java dnf_sort/dnf_sort.js

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Yes

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@ikaushiksharma