In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Ex Input:
3923 # 9826 # 9066 # 9343 # 4675 @ 4896 # 8019 @ 4615 # 3491

Ex Output:
-30986


Ex Input:
5110 # 9803 @ 2485 # 1678

Ex Output:
-3886


Ex Input:
578 # 3171 # 5382 # 1950 @ 6693 @ 2319 @ 2806 @ 9910 @ 8541

Ex Output:

20344