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: 7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Output: -1907


Input: Consider Input: 3876 @ 6607 # 1034 # 2483 @ 544 # 1053 @ 4907 @ 1303 @ 3904

Output: 16571


Input: Consider Input: 9518 @ 5692 @ 1605 @ 5210 # 5643 @ 4406 # 8200


Output: 12588