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bharatr21 · May 22, 2020 · b7c59d7 · b7c59d7
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commit b7c59d7
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diff --git a/README.md b/README.md
@@ -26,4 +26,5 @@ 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) |
+20|Matrices| O(mn) | [S21](Solutions/S21.cpp) |
 22|Strings, Dictionary/Hashing| O(n) | [S22](Solutions/S22.py) |