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:
8451 # 7523 @ 454 @ 459 @ 182 @ 6187 # 2835

Ex Output:
5375


Ex Input:
6514 # 8296 # 4939 # 5783 @ 1077 @ 3237 @ 5941 # 7665 # 2408

Ex Output:
-12322


Ex Input:
6385 @ 2852 @ 441 @ 5217 # 235 # 2392 @ 3068

Ex Output:

15336