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: 353 # 9525 @ 9923 @ 4025 # 1922 @ 4751

Output: 7605


Input: Consider Input: 3534 # 3443 # 2461 @ 2928 @ 615 # 2946 @ 7246


Output: 5473