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: 1709 # 2270 # 1077 # 9681

Output: -11319


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

Output: 16571


Input: Consider Input: 8462 # 2453 @ 1154 # 4293 @ 6013


Output: 8883