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: 486 # 3873 # 1187

Output: -4574


Input: Consider Input: 7944 # 4957 # 8255 @ 684

Output: -4584


Input: Consider Input: 1155 @ 6254 @ 7644 # 4767


Output: 10286