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: 4899 # 3034 @ 3351 @ 7952 @ 4527 # 2700 # 3143 @ 3642 # 2445

Output: 13049


Input: Consider Input: 2057 # 2330 # 9059 # 2713 # 7404 @ 4349

Output: -15100


Input: Consider Input: 3505 @ 1319 # 304 # 2659 @ 6688


Output: 8549