Add new practice exercise bank-account (#708)

jiegillet · web-flow · commit 3aaaf121b0f5 · 2024-12-11T17:37:46.000+08:00
* Add new practice exercise `bank-account`

* remove unused pattern

* foregone the exercise instead
diff --git a/config.json b/config.json
@@ -1393,6 +1393,10 @@
         ],
         "difficulty": 3
       }
+    ],
+    "foregone": [
+      "bank-account",
+      "parallel-letter-frequency"
     ]
   },
   "concepts": [
