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:
3615 @ 7429 @ 6810 # 207 @ 1232 # 5621 @ 6745

Ex Output:
20003


Ex Input:
2569 # 3660 # 2044 @ 3564 # 7082 @ 4306 @ 254 @ 4425

Ex Output:
2332


Ex Input:
8192 @ 7623 @ 6333

Ex Output:

22148