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:
1076 @ 6433 # 796 # 1827 # 5999 @ 96 # 7117

Ex Output:
-8134


Ex Input:
8137 @ 5006 # 7743 @ 1478

Ex Output:
6878


Ex Input:
4786 @ 2734 @ 7933

Ex Output:

15453