1000
deposit 500
withdraw 200
END

1300

class BankAccount:
    def __init__(self, balance):
        self.balance = balance
    def deposit(self, amount):
        self.balance += amount
    def withdraw(self, amount):
        if amount > self.balance:
            print('잔액 부족')
        else:
            self.balance -= amount

account = BankAccount(int(input()))
while True:
    line = input().strip()
    if line == 'END':
        break
    parts = line.split()
    op, amount = parts[0], int(parts[1])
    if op == 'deposit':
        account.deposit(amount)
    else:
        account.withdraw(amount)
print(account.balance)