Merge pull request #360 from ricemery/difference-of-squares

Add file with expected interface. Refs #137

Author: ErikSchierboom

exercises/difference-of-squares/src/main/scala/Squares.scala

@@ -0,0 +1,8 @@
+object Squares {
+
+  def sumOfSquares(n: Int): Int = ???
+
+  def squareOfSums(n: Int): Int = ???
+
+  def difference(n: Int): Int = ???
+}