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:
6267 @ 3304 @ 9078 @ 9734 # 2947 # 4223 @ 4824 # 3116

Ex Output:
22921


Ex Input:
8524 # 5976 # 1534 @ 266 # 6452 @ 3945 # 2305

Ex Output:
-3532


Ex Input:
2132 @ 1705 @ 943

Ex Output:

4780