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:
1916 @ 5847 @ 4371

Ex Output:
12134


Ex Input:
643 @ 9262 # 6489 @ 1803 @ 6271

Ex Output:
11490


Ex Input:
6707 @ 7694 @ 3786 @ 8447 @ 3020 @ 6001 # 9653

Ex Output:

26002