diff --git a/README.md b/README.md
index f309d68..562fff0 100644
--- a/README.md
+++ b/README.md
@@ -26,3 +26,4 @@ Problem | Concepts/Algorithms Used | Complexity | Solution
 18|Sliding Window, Substring| O(n2) (n2 -> Length of larger string) | [S18](Solutions/S18.cpp) |
 19|Stacks| O(n) | [S19](Solutions/S19.cpp) |
 20|Binary Search Trees (BST)| O(n) (n -> Number of nodes) | [S20](Solutions/S20.cpp) |
+22|Strings, Dictionary/Hashing| O(n) | [S22](Solutions/S22.py) |