added contributing.md

youhaveme9 · web-flow · commit 1226f8e9e4b1 · 2020-12-17T14:37:44.000+05:30
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+# CONTRIBUTION
+We are very thankful that you considered contributing in this reposetory.
+New implementation is welcome! For example, new solutions for a problem, different representations for a graph data structure or algorithm designs with different complexity.
+
+# Pattern 👾
+Before adding new pattern make sure that you must add a comment displaying the pattern you are going to make.
+![Example](https://github.com/Roshaen/Algorithms_cpp/blob/master/Pattern/example.JPG?raw=true "Comment")
+
+Suggestions are welcome!! 😀
