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:
4787 # 6151 # 6235

Ex Output:
-7599


Ex Input:
2787 @ 3800 # 142 # 7750 # 8581 @ 5447 @ 1512 @ 6550

Ex Output:
3623


Ex Input:
6703 # 4041 @ 8382 # 8294 # 2367 @ 5812

Ex Output:

6195