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:
9273 # 8850 @ 3050

Ex Output:
3473


Ex Input:
3782 @ 4127 # 1265 # 1395 @ 2430 @ 6990 @ 8573 @ 8170

Ex Output:
31412


Ex Input:
6148 # 6879 @ 7733 # 6643 # 1316

Ex Output:

-957