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: 9336 # 483 # 2765

Output: 6088


Input: Consider Input: 510 @ 3119 @ 9851 @ 3082 # 9532 @ 4028 @ 4613 # 4621


Output: 11050