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:
3586 # 8254 # 4130 # 5426

Ex Output:
-14224


Ex Input:
1477 @ 6645 @ 6272 # 3080

Ex Output:
11314


Ex Input:
6108 @ 2133 @ 8600

Ex Output:

16841