Write balances(start, txns) returning the account balance after each transaction (deposits positive, withdrawals negative).
balances(1000, [500, -200, -300]) → [1500, 1300, 1000]
balances(0, []) → []
Submit runs 4 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.