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:
2132 @ 8398 # 9269

Ex Output:
1261


Ex Input:
450 @ 1087 @ 3131 @ 4240 # 7967 @ 1264 # 6050

Ex Output:

-3845