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:
3938 @ 6900 @ 1254 @ 25 # 7237 # 5576 @ 8865 # 8864 @ 1349

Ex Output:
654


Ex Input:
636 # 9939 @ 3769 @ 8322 # 3343 @ 8680 # 1129 # 9882 # 3400

Ex Output:
-6286


Ex Input:
1401 # 2544 @ 7126 @ 6921 # 2555 @ 6216 @ 8833

Ex Output:

25398