payments_number = int(input())
contributions_sum = float(input())
account_balance = 0
counter = 1

while counter <= payments_number:

    if contributions_sum < 0:
        print("Invalid operation!")
        break
    else:
        print(f"Increase: {contributions_sum:.2f}")
        account_balance += contributions_sum
        counter += 1
        contributions_sum = float(input())

print(f"Total: {account_balance:.2f}")