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:
1075 @ 2179 @ 2132 @ 6333 @ 8433 # 8868 # 1568 # 5987 # 5042

Ex Output:
-1313


Ex Input:
8137 @ 5006 # 7743 @ 1478

Ex Output:
6878


Ex Input:
8849 @ 869 @ 880 @ 8843 @ 8122

Ex Output:

27563