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:
2405 @ 2160 @ 394 # 8936 # 2551 @ 5734 @ 5167

Ex Output:
4373


Ex Input:
6853 # 3523 @ 1895 @ 6916 @ 2795 # 8802 # 3074 # 5622 @ 956

Ex Output:
-1606


Ex Input:
1150 # 2099 @ 8267 @ 9120 # 1878

Ex Output:

14560