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:
8041 @ 762 @ 8091 @ 6500

Ex Output:
23394

Ex Input:
3309 @ 2855 @ 8458 # 3671 # 4410 # 6229 # 4661 # 2777

Ex Output:
-7126

Ex Input:
1691 # 755 @ 5734 # 4774 @ 4915 # 7249 # 47

Ex Output:
-485