Create README.md

Author: fffelix-jan

README.md

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+# DiffIntFactorTriplet
+A simple C++ program used to sets of three integer factors that are different and have a common product. This was ported from my original Python script.  
+
+# Usage
+After compiling the program, simply run the program and type in an integer, and press Enter/Return. It is a lot faster than the Python version.