diff --git a/src/hackerRank/functional1.hs b/src/hackerRank/functional1.hs
new file mode 100644
index 0000000..4d8542d
--- /dev/null
+++ b/src/hackerRank/functional1.hs
@@ -0,0 +1,4 @@
+-- https://www.hackerrank.com/challenges/fp-list-replication/
+
+f :: Int -> [Int] -> [Int]
+f s = concatMap (replicate s)