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:
1709 # 2270 # 1077 # 9681

Ex Output:
-11319


Ex Input:
8932 # 2337 @ 825 # 8463 @ 528

Ex Output:
-515


Ex Input:
7845 # 853 # 1940 # 3885 @ 9503 @ 3167 @ 6113 @ 819 # 1102

Ex Output:

19667