square root symbol

labs/11_hash_tables/README.md

@@ -27,10 +27,10 @@ Input: n = 19
 Output: true
 
 Explanation:
-12 + 92 = 82
+1^2 + 9^2 = 82
-82 + 22 = 68
+8^2 + 2^2 = 68
-62 + 82 = 100
+6^2 + 8^2 = 100
-12 + 02 + 02 = 1
+1^2 + 0^2 + 0^2 = 1
 ```
 
 ```console