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:
3522 @ 8651 @ 5172 # 4816 # 7424 # 1074 # 1822 # 1419

Ex Output:
790


Ex Input:
581 # 2278 @ 452 # 5411 # 7564 @ 8148 # 2350 # 8956 # 4877

Ex Output:
-22255


Ex Input:
4114 @ 168 @ 966 # 6907 # 1175 # 5251 @ 1246

Ex Output:

-6839