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:
7720 @ 5171 # 6139 @ 480

Ex Output:
7232


Ex Input:
3970 # 8486 # 9402 # 8030 @ 4724 @ 8858

Ex Output:
-8366


Ex Input:
3701 @ 189 # 1118 @ 6229 # 5869 @ 7082

Ex Output:

10214