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:
2020 @ 8125 # 252 # 2790 # 9183 @ 3123 # 7282 # 5115 # 1943

Ex Output:
-13297


Ex Input:
9852 # 24 # 2468 @ 5798 @ 6384

Ex Output:
19542


Ex Input:
1678 # 2253 # 234 # 8420 @ 7965 @ 4026 @ 6472 @ 152

Ex Output:

9386