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:
4071 # 2406 @ 1349 @ 5528 @ 7426 @ 2448 # 1981 # 7844

Ex Output:
8591


Ex Input:
7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Ex Output:
-1907


Ex Input:
2571 @ 9511 @ 2462

Ex Output:

14544