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:
8172 @ 6594 # 2768 # 40 @ 9214 @ 3626

Ex Output:
24798


Ex Input:
9673 @ 7136 # 4171 # 8296 @ 655

Ex Output:
4997


Ex Input:
8485 # 5210 @ 5782 @ 9255 @ 3766 @ 178 # 2015

Ex Output:

20241