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:
1614 # 4521 @ 7508 # 7726 @ 6176 @ 8975 # 693

Ex Output:
11333


Ex Input:
381 # 4084 # 9377 # 3092

Ex Output:
-16172


Ex Input:
1125 @ 2040 @ 7675 @ 6179

Ex Output:

17019