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: 5235 @ 3917 @ 4902 @ 3831 # 6517

Output: 11368


Input: Consider Input: 7348 @ 4245 # 4410 @ 1843 @ 7541 # 5153 # 4328


Output: 7086