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:
2307 # 9363 @ 4926 @ 5635

Ex Output:
3505


Ex Input:
473 # 2568 @ 9771 # 2525 @ 3277 @ 261 # 8230 @ 6021

Ex Output:
6480


Ex Input:
3941 # 8139 @ 9246 # 9951 # 4083 @ 1655 @ 9633

Ex Output:

2302