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: 1278 @ 4628 @ 2357 @ 3694 @ 5775 @ 8542 # 793

Output: 25481


Input: Consider Input: 1855 # 9818 @ 3927 @ 9533 # 8557 @ 619 # 7543 # 2844

Output: -12828


Input: Consider Input: 6267 @ 3545 @ 4904 @ 4580


Output: 19296