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:
7671 # 7716 @ 5899 @ 2520 # 497 # 24 # 16 # 840 # 9556

Ex Output:
-2559


Ex Input:
5610 # 3034 @ 9312 @ 7337 @ 2731 @ 8581 @ 5926 # 2102 @ 2137

Ex Output:
36498


Ex Input:
6686 @ 3630 @ 2067 # 420 # 7554 # 8192 @ 9504 @ 3833

Ex Output:

9554