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:
8842 @ 3530 @ 7537

Ex Output:
19909


Ex Input:
3782 @ 4127 # 1265 # 1395 @ 2430 @ 6990 @ 8573 @ 8170

Ex Output:
31412


Ex Input:
1547 # 9582 # 1546 @ 4772 # 7194 @ 5282 @ 2908 # 7082

Ex Output:

-10895