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:
4899 # 3034 @ 3351 @ 7952 @ 4527 # 2700 # 3143 @ 3642 # 2445

Ex Output:
13049


Ex Input:
8280 # 2607 # 4185 # 9243 @ 9839

Ex Output:
2084


Ex Input:
8812 # 3527 # 6535 # 6104 # 7311 @ 6342 @ 901

Ex Output:

-7422