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

Input: Consider Input: 8899 # 4509 # 9411 # 7373

Output: -12394


Input: Consider Input: 1296 @ 9756 @ 2493 @ 9940 # 5147 # 5428 # 5741 # 828

Output: 6341


Input: Consider Input: 5226 @ 7923 @ 3546 @ 9364 @ 8819


Output: 34878