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:
9276 @ 7324 @ 3048 # 8186 # 4920 # 2964

Ex Output:
3578


Ex Input:
4844 # 1525 @ 1894 # 2506

Ex Output:
2707


Ex Input:
712 # 5691 @ 3397 # 8217 @ 4762 # 2776 # 1233

Ex Output:

-9046