Banking System with Top Activity Accounts

Problem: Implement a Banking System and Query Top Active Accounts Implement a simple banking system that supports account creation, deposits, transfers, and querying the top N accounts with the highest financial activity. Operations Given a list of operations, execute them in order and output the result of each operation. Supported operations: 1. CREATE_ACCOUNT account_id Create an account. If the account already exists, return false. Otherwise create it with initial balance 0 and activity 0, and return true. 2. DEPOSIT account_id amount Deposit money into an account. If the account does not exist, return -1. Otherwise increase its balance by amount, increase its activity by amount, and return the new balance. 3. TRANSFER from_id to_id amount Transfer money from from_id to to_id. If either account does not exist, return -1. If from_id == to_id, return -1. If the source account does not have enough balance, return -1. Otherwise: decrease from_id balance by amount and increase its activity by amount; increase to_id balance by amount and increase its activity by amount; return the source account's balance after the transfer. 4. TOP_ACTIVITY n Return the top n accounts with the highest activity. Financial activity indicator is the absolute sum of all successful transaction amounts for an account, including deposits and successful transfers. Failed transactions are not included. Sorting rules: activity descending; if tied, account_id lexicographically ascending. Return an array of strings in this format: ["account1(5400)", "account3(4000)", "account2(3000)"] If fewer than n accounts exist, return all accounts. Input Format q operation_1 operation_2 ... operation_q Each operation is one of: CREATE_ACCOUNT account_id DEPOSIT account_id amount TRANSFER from_id to_id amount TOP_ACTIVITY n Output Format Print one line per operation. Boolean values should be printed as true / false. Arrays should be printed in JSON-like string array format. Constraints 1 <= q <= 2 * 10^5 1 <= len(account_id) <= 30 1 <= amount <= 10^9 1 <= n <= 10^5 All balances and activity values fit in signed 64-bit integers. Example Input 15 CREATE_ACCOUNT account1 CREATE_ACCOUNT account1 CREATE_ACCOUNT account2 DEPOSIT non-existing 2700 DEPOSIT account1 2700 TRANSFER account1 account2 2701 TRANSFER account1 account2 200 TRANSFER account1 account2 2500 DEPOSIT account2 300 CREATE_ACCOUNT account3 DEPOSIT account3 4000 TOP_ACTIVITY 3 DEPOSIT account2 1000 TOP_ACTIVITY 2 TOP_ACTIVITY 5 Output true false true -1 2700 -1 2500 0 3000 true 4000 ["account1(5400)", "account3(4000)", "account2(3000)"] 4000 ["account1(5400)", "account2(4000)"] ["account1(5400)", "account2(4000)", "account3(4000)"]