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:
353 # 799 @ 4824 # 3212 @ 1811 @ 752

Ex Output:
3729


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

Ex Output:
4373


Ex Input:
7920 # 9746 @ 5044 # 1631 # 3413 @ 8228

Ex Output:

6402