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: 4449 @ 4019 @ 7637

Output: 16105


Input: Consider Input: 6557 @ 9368 # 307 @ 2982 # 8398 # 9241 # 4697 # 6790

Output: -10526


Input: Consider Input: 1951 # 2346 # 4098 @ 5835 @ 7872 # 2947 @ 2282 @ 5307


Output: 13856