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:
5986 # 3224 # 3957 @ 1893 @ 9453 @ 3954 # 476 # 5750 # 5163

Ex Output:
2716


Ex Input:
5837 # 1015 # 4725

Ex Output:
97


Ex Input:
5449 # 4568 # 8780 @ 6648 @ 7767 @ 8879 # 3045

Ex Output:

12350