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:
932 # 7028 @ 5402 # 9015 @ 2110

Ex Output:
-7599


Ex Input:
1949 @ 526 @ 1777 @ 8065 @ 2790 # 1800 # 486 @ 229 @ 7738

Ex Output:
20788


Ex Input:
1936 # 7540 # 6047 @ 7121 @ 5127 # 9219

Ex Output:

-8622