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:
2984 # 596 # 8941 @ 4235 @ 5264 @ 351 # 3797 @ 7168 # 55

Ex Output:
6613


Ex Input:
540 @ 8823 @ 1244 # 1696 # 889 # 6035 # 5113 @ 2513

Ex Output:
-613


Ex Input:
4062 @ 742 @ 9696

Ex Output:

14500