feat/ update readme

Author: nik-rev

16_sumSquares/README.md

@@ -1,3 +1,10 @@
-# Exercise 13 - sumSquares
+# Exercise 16 - sumSquares
 
-Description of the exercise goes here.
+Write a function that sums squares of numbers in an arbitrarily nested array
+
+```javascript
+SumSquares([1,2,3]); // 1 + 4 + 9 = 14
+SumSquares([[1,2],3]); // 1 + 4 + 9 = 14 
+SumSquares([[[[[[[[[1]]]]]]]]]); // 1 = 1
+SumSquares([10,[[10],10],[10]]); // 100 + 100 + 100 + 100 = 400
+```