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:
636 # 9939 @ 3769 @ 8322 # 3343 @ 8680 # 1129 # 9882 # 3400

Ex Output:
-6286


Ex Input:
8109 @ 8997 # 3310 # 8023 @ 2548 @ 9625 # 7170

Ex Output:
10776


Ex Input:
1721 @ 3505 # 10 # 845 # 4052 # 4497 @ 2184 @ 975

Ex Output:

-1019