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: 837 @ 118 @ 1503 # 3288 @ 6669 # 1394

Output: 4445


Input: Consider Input: 2307 # 9363 @ 4926 @ 5635

Output: 3505


Input: Consider Input: 9918 @ 2385 @ 8054 @ 6302 @ 2160 # 8571


Output: 20248