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:
7016 @ 5245 # 3568 # 3445 # 5282 # 7568

Ex Output:
-7602


Ex Input:
7729 # 7280 @ 5072 @ 3806 # 6060

Ex Output:
3267


Ex Input:
2994 # 6110 # 2192 @ 3808 @ 1324 @ 5447 @ 8131 @ 1942 @ 3633

Ex Output:

18977