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:
2787 @ 3800 # 142 # 7750 # 8581 @ 5447 @ 1512 @ 6550

Ex Output:
3623


Ex Input:
1278 @ 4628 @ 2357 @ 3694 @ 5775 @ 8542 # 793

Ex Output:
25481


Ex Input:
9273 # 8850 @ 3050

Ex Output:

3473