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: 5263 @ 8483 # 8668 @ 4802 # 7388 @ 2501 @ 3137 # 8399

Output: -269


Input: Consider Input: 7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Output: -1907


Input: Consider Input: 3258 @ 8255 # 4382


Output: 7131