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: 1917 @ 4353 @ 4321 @ 3060 @ 6681 @ 7890 @ 8148

Output: 36370


Input: Consider Input: 8524 # 5976 # 1534 @ 266 # 6452 @ 3945 # 2305

Output: -3532


Input: Consider Input: 7234 # 1603 @ 9547 @ 2706 # 1341 # 5108 @ 7094 @ 2734 # 2769


Output: 18494