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:
7371 # 9025 @ 8352 # 9201 # 9297 # 3561 @ 8576

Ex Output:
-6785


Ex Input:
3309 @ 2855 @ 8458 # 3671 # 4410 # 6229 # 4661 # 2777

Ex Output:
-7126


Ex Input:
8231 # 1947 @ 3178 # 7153 # 4094 @ 2169

Ex Output:

384