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:
634 # 6766 # 1458 # 4376 @ 9425

Ex Output:
-2541


Ex Input:
2863 @ 9899 # 2358

Ex Output:

10404