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:
1463 @ 3742 @ 6816 @ 2090 @ 7068 @ 283 # 5740 @ 4067

Ex Output:
19789


Ex Input:
2808 @ 9510 # 4684 @ 8160 # 7003 # 6631 # 9199 # 455

Ex Output:
-7494


Ex Input:
2088 @ 3514 # 9030 @ 9964 # 4877 @ 8220 # 1284 # 1547

Ex Output:

7048