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:
8698 # 7378 # 9188 @ 5767 # 2935 # 2532 @ 7113

Ex Output:
-455


Ex Input:
1077 @ 2451 @ 9445 @ 1297 @ 2639 # 27 # 9331 @ 8713

Ex Output:
16264


Ex Input:
6447 # 8359 # 9364 # 3868 @ 4095 @ 1870 # 3698 @ 2381

Ex Output:

-10496